Vibrant Performance Technical Support & FAQs

Vibrant Performance products are available through a large network of authorized distributors and retailers throughout North America and many other parts of the world. Our product line includes performance exhaust components, resonators, mufflers, flexible exhaust couplers, performance hoses, HD clamps and other automotive performance products. To find a retailer or distributor that carries the products you need, please contact Vibrant Performance for assistance.

We recommend that Vibrant Performance products, particularly products that require welding, be installed by a qualified professional installer or experienced fabricator. Many products are also designed for relatively simple assembly or bolt-on installation. For fluid-delivery products and direct-fit components such as catch cans and oil adapters, Vibrant Performance offers installation tools and instructions to make installation easier. Always follow the product-specific installation instructions and use proper installation techniques. If you experience difficulties during a DIY installation or have questions about product fitment or installation, contact our technical support team at tech@vibrantperformance.com.

Several factors determine how a resonator or muffler will affect the final exhaust sound, noise level and drone. Engine size, number of cylinders, firing order, valve timing, exhaust manifold or header design, tubing diameter and overall exhaust system configuration can all influence the result. For example, a V8 engine with cast-stock exhaust manifolds produces different exhaust wave frequencies than a four-cylinder boxer engine equipped with an equal-length header. Vibrant Performance resonators and mufflers use a straight-through perforated core, stainless steel mesh and densely packed ceramic/fiberglass composite material to absorb exhaust sound while maintaining efficient exhaust flow. In most street applications, this design provides effective resonance absorption and a quieter, more refined exhaust note at lower engine speeds while allowing the engine to produce a more aggressive sound under higher load. When selecting a resonator or muffler, consider body size, internal volume, shape, exhaust system placement and available installation space.

Vibrant Performance resonators and mufflers use a straight-through perforated core surrounded by stainless steel mesh and ceramic/fiberglass composite packing to absorb exhaust sound and reduce unwanted resonance. Each time an exhaust valve opens, an exhaust pulse travels through the exhaust system. When the pulse reaches a suppressive device, some of the sound energy travels through the perforated core and into the packing material, where the energy is absorbed before returning to the exhaust stream. The size and shape of the suppressive device also affect its performance. Generally, a larger muffler or resonator body provides more packing volume and greater sound absorption. The oval shape of products such as the Vibrant Performance Ultra Quiet resonator provides varying distances between the perforated core and outer body, helping attenuate a broader range of exhaust frequencies. Chambered exhaust designs rely primarily on pulse-wave reflection and cancellation rather than packing material, making placement particularly important when addressing specific resonance frequencies.

For many applications, we recommend installing a resonator in the area under the front seats of the vehicle. This location can be effective for reducing low- to mid-range drone frequencies that occur during steady-state highway driving. Installing the resonator farther upstream can help address unwanted resonance before the sound wave travels through the entire exhaust system. It can also help prevent drone from reverberating through the vehicle floor and into the passenger compartment. However, the ideal resonator location depends on the vehicle and exhaust system. In some applications, unwanted resonance may occur farther downstream, such as near the rear axle or rear-seat area. The resonator should be positioned where it can most effectively target the unwanted frequency. Long sections of exhaust tubing without a suppressive device can also allow certain resonance frequencies to become amplified. As a general guideline, avoid leaving more than approximately 5 feet of exhaust tubing without a resonator or muffler when system design and packaging allow.

No. Vibrant Performance resonators and mufflers feature a straight-through perforated stainless steel core design that minimizes exhaust flow restriction. They are not flow directional, so they can generally be installed with the inlet and outlet facing either direction. Proper placement, fitment and installation remain important for achieving the desired exhaust sound and noise reduction.

Vibrant Performance resonator and muffler inlet and outlet sizes are specified by the inside diameter (ID) of the neck. This means the exhaust tubing is designed to slip inside the resonator or muffler neck, creating a lap joint that can then be welded on each end. Always verify the product specifications and tubing dimensions before fabrication to ensure proper fitment.

Vibrant Performance exhaust products, with the exception of Race Mufflers, are designed and manufactured to meet or exceed many North American federal, state and provincial requirements when properly installed and used. However, exhaust regulations can vary significantly by jurisdiction. Some local governments have enacted strict regulations regarding modified exhaust systems or interpret existing regulations differently. Because exhaust laws can change, Vibrant Performance cannot guarantee that a particular aftermarket exhaust configuration is legal in every jurisdiction. Customers should verify applicable local, state, provincial and federal requirements before installing an aftermarket exhaust system.

Universal mufflers, axle-back systems and cat-back systems are not emissions-control devices and do not themselves control vehicle emissions. Before an emissions test, inspect the exhaust system for leaks, as an exhaust leak may contribute to a failed test depending on the testing procedure and vehicle. Fasteners, gaskets and other components should be inspected and repaired as necessary. The vehicle's catalytic converter and oxygen sensors are important components of the emissions-control system and should be maintained according to the vehicle manufacturer's recommended maintenance schedule.

The correct flexible exhaust coupler depends on the location of the coupler, operating temperature, expected movement and whether the application is pre-turbo, post-turbo, naturally aspirated or an OEM replacement. For pre-turbo applications, including crossover pipes and compound-turbo feed pipes, a 321 stainless steel electropolished bellows assembly with a directional-flow solid liner is the recommended choice. This configuration is designed to withstand extreme temperatures and heat cycles. When significant thermal growth, vibration or movement is expected, a Boost Brace 12648 is recommended to help prevent telescoping or excessive bellows movement. For post-turbo applications, such as downpipes or applications following a header collector in a supercharged system, a Turbo Flex Coupler with an interlock liner is recommended. For naturally aspirated or OEM replacement applications, a standard flexible coupling with an inner braid, or without an inner liner where appropriate, may be used.

For best results when installing a Turbo Flex Coupler:

1. Insert the exhaust tubing into each end of the flex coupler as far as it will fit, typically approximately 3/4 inch.
2. TIG weld the lap joint using 308 filler rod and a #12 cup/gas lens.
3. Focus the welding arc primarily on the tubing and introduce filler into the keyhole from the cap-ring side.
4. Capture all layers of the flex assembly, including the cap ring, in the weld pool.
5. Use sufficient argon post-flow to allow the weld pool to cool and prevent oxidation. A minimum of 8 seconds is recommended, with approximately 5 seconds for tacking.
6. Back purging should be used where appropriate for stainless steel fabrication.

Some fabricators prefer to fuse the layers together before inserting the exhaust tubing. This can be useful when access to the weld joint is limited or when a flange needs to be added to the end of the flex assembly. Do not weld the cap ring directly to a flange. If a flange is required, weld tubing into the flex coupler and attach the flange to the tubing.

A flexible exhaust coupler should be installed in a relaxed, neutral position rather than under tension. The coupler acts like a spring within the exhaust system, so a longer coupler generally provides greater flexibility. Do not use a flex coupler to create a bend or compensate for misaligned exhaust tubing. It should not be forced into a joint between offset tubes. Avoid wrapping or coating the tubing directly ahead of a flexible bellows. Doing so can trap heat within the tubing and force excessive heat into the flex assembly, potentially causing premature fatigue and failure. Proper support and alignment are also important when significant thermal expansion, vibration or movement is expected.

Stainless steel can develop surface oxidation or discoloration, particularly when exposed to repeated heat cycles or contamination from carbon steel. 304 stainless steel can be especially susceptible to surface oxidation in high-temperature applications. Cross-contamination can occur when stainless steel components contact carbon-steel tools, benches, polishing equipment or other materials that transfer carbon particles onto the stainless surface. Heat cycles can accelerate oxidation and cause microscopic cracking in the protective surface layer as the material repeatedly expands and contracts. One way to restore and improve corrosion resistance after fabrication is to have stainless steel components passivated and electropolished after welding. This process removes surface contamination and heat discoloration while helping restore the protective surface layer. Higher-alloy stainless steels such as 309, 310, 316 and 321 generally provide greater resistance to oxidation in high-temperature applications than 304 stainless steel.

The Vibrant Performance HD clamp system is designed for demanding forced-induction and motorsport applications where charge piping is subjected to vibration, temperature changes and engine movement. The HD clamp creates a flexible, dynamic connection that allows rotational, telescoping and angular movement between components while maintaining a sealed connection. This helps reduce the stress that can otherwise cause charge piping cracks or fatigue. The system uses a tight-tolerance O-ring seal and a quick-release clamp design that can be serviced without tools. The system has been tested to maintain a leak-free joint at pressures above 800 psi of boost. This combination of flexibility, sealing performance and quick serviceability makes the HD clamp system well suited for high-performance and motorsport charge piping applications.

For optimal HD clamp performance, plan the charge piping system before fabrication. Using two clamps, positioned at both ends of the charge piping on the hot and cold sides, is considered best practice because it helps isolate engine movement from the static intercooler assembly. Consider the direction of engine movement when positioning the clamps. The system should be designed to avoid imposing excessive shear loads on the clamps, which can lead to leaks or clamp failure. During intercooler piping mock-up, maintain approximately 1/8 inch or less of gap between the HD flange faces. This gap must remain after fabrication to allow the clamp assembly to accommodate movement during operation. Vibrant Performance offers an alignment tool to help maintain the correct gap during fabrication. Proper weld-ferrule alignment is critical. During mock-up and final welding, the charge pipe should remain properly aligned and should be able to move freely by hand. Use a heat sink when finish welding the flanges to help prevent flange distortion. Stainless steel and titanium flanges and tubing should also be back purged during welding.

The HD clamp system relies on a precision O-ring seal to maintain a leak-free connection. The O-ring deforms into the space between the union sleeve and weld ferrule, creating a fluid-tight seal. As pressure increases, the O-ring is forced more tightly into the sealing area. Before assembly, make sure the O-ring, groove, union sleeve and weld ferrule are clean and free of dirt, grit, chips and other contaminants. Inspect the O-ring regularly for cuts, nicks, scratches, abrasion, deformation or other signs of wear. O-rings are wear items and should be included in regular pre-competition inspections. Apply a light film of the recommended lubricant before installation to help prevent pinching, twisting and damage.

A lubricant should be used when installing HD clamp O-rings, particularly in applications involving dynamic movement. Proper lubrication helps reduce friction and leakage while helping prevent the O-ring from twisting or being damaged during assembly. Parker Super-O Lube is recommended. Petroleum-based products such as Vaseline or engine oil may also be used according to the original technical guidance. Only a light film of lubricant is necessary. Excessive lubricant should be avoided, particularly in high-temperature applications.

Proper fabrication, alignment, cleanliness and O-ring maintenance are essential for preventing leaks in an HD clamp system.

Before assembly:

• Keep all components clean and free of dirt and debris.
• Inspect the O-ring for cuts, abrasion, deformation or other damage.
• Verify proper alignment of the weld ferrules.
• Maintain approximately 1/8 inch or less of gap between the HD flange faces.
• Use a heat sink during final welding to prevent flange distortion.
• Back purge stainless steel and titanium welds.
• Avoid excessive engine movement by using appropriate engine mounts.

A deformed or "fish-mouthed" weld ferrule can result from excessive welding heat or failure to use a heat sink. Damage to the O-ring, groove or union sleeve can also compromise sealing performance.

Yes. The HD clamp system includes small holes in the pin head and hinge side of the clamp that allow the pin to be tethered to the clamp using lock wire. This feature can help prevent the pin from being dropped or lost during trackside servicing and is particularly useful in motorsport applications where quick serviceability is important.

Selecting the right performance hose depends on the fluid, operating pressure, operating temperature, ambient temperature, flexibility requirements and hose-end configuration.

Vibrant Performance offers several hose types for different applications:

• Push-On hose: Light-duty applications such as vacuum, coolant, crankcase ventilation and catch can systems.
• Braided Flex hose: Medium-duty applications including fuel, oil, coolant, vacuum and crankcase ventilation.
• PTFE-lined hose: Heavy-duty applications requiring high pressure, high temperature and broad fluid compatibility.

Always verify the hose's maximum operating pressure, operating temperature, fluid compatibility and minimum bend radius before installation.

Choose a hose with a maximum operating pressure that is appropriate for the application's continuous pressure and pressure surges. Vibrant Performance hose assemblies are designed for continuous operation at their specified maximum rated pressure. In most cases, the operating pressure rating is approximately 25% of the hose burst pressure. Applications operating above 200 psi require additional consideration. High-pressure hose assemblies can be hazardous if they fail and should be properly secured and protected from mechanical, chemical and external damage. Pressure spikes can also shorten hose life. If significant pressure surges are present, select a hose with a higher maximum operating pressure and use electronic pressure monitoring where appropriate.

Hose temperature ratings refer to the temperature of the media inside the hose. Operating a hose continuously near its maximum temperature rating can accelerate material deterioration and reduce service life. Excessive heat can cause inner-liner or outer-cover fatigue, cracking, delamination and reduced hose-end retention. Ambient temperature is also important. When a hose is exposed to high external heat, its outer cover can deteriorate even when the media temperature is within the hose's rating. Where a hose is installed within approximately 6 inches of exhaust components or another high-heat source, an appropriate thermal sleeve should be used.

Follow the manufacturer's recommended minimum bend radius when routing a performance hose. Bending a hose tighter than its recommended radius can reduce pressure capability, flow capacity and service life. Extreme negative pressure can also cause hose collapse, particularly on -12AN and larger hoses. An internal support spring is recommended for applications where these hoses experience significant vacuum. Avoid forcing a hose into a sharp bend immediately after the hose end. Proper routing and adequate clearance help prevent excessive stress and premature hose failure.

Performance hose assemblies should be inspected regularly for signs of leaks, kinking, abrasion, bulging, deformation, cracking or other damage. Hoses operating under high pressure, high temperature or demanding motorsport conditions should receive more frequent inspections. Fuel-system hoses should be drained and internally inspected as part of regular maintenance. Where appropriate, the hose can be flushed with clean compressed air or water at 150°F. Fuel systems that continuously circulate fuel back to the tank may require more frequent inspection because fuel oxidation can deteriorate the hose's inner liner over time.

Hose permeability refers to the ability of certain liquids, vapors or gases to pass through a hose liner at the molecular level. Materials such as PTFE, CPE, polyethylene and rubber can be permeable to different fluids. The rate of permeation depends on the hose liner material, fluid type and operating conditions. PTFE has the lowest permeability of the materials referenced here, making PTFE-lined hose a strong choice for applications where fluid compatibility and permeation resistance are important. Permeation does not necessarily damage the structure of the hose. One indication of permeation can be the ability to smell the fluid as it passes through the liner and off-gasses from the outside of the hose.

Maintaining the correct minimum bend radius is important for maximizing hose performance, flow capacity and service life. The minimum bend radius should not be exceeded, particularly at maximum operating pressures.

Minimum bend radius for Vibrant Performance Braided Flex and Push-On hoses:

-4AN = 1.5”

-6AN = 2.0”

-8AN = 2.5”

-10AN = 3.0”

-12AN = 4.0”

-16AN = 6.0”

-20AN = 7.0”

Minimum bend radius for PTFE lined hoses:

-4AN = 1.5”

-6AN = 2.0”

-8AN = 2.5”

-10AN = 3.0”

-12AN = 5.0”

Maintain a minimum straight length of approximately 2× the hose outside diameter between the hose end and the beginning of the bend. The hose should not begin bending immediately at the hose end. An internal support spring is recommended when a hose must operate at or beyond its minimum outside bend radius, or when -12AN and larger Braided Flex or Push-On hoses will experience significant vacuum.

Vibrant Performance offers several performance hose options designed for different pressure, temperature and fluid requirements.

Push-On Hose — Light Duty

Push-On hose is designed for use with Vibrant Performance Push-On hose ends. It has a maximum operating temperature of 212°F and a maximum operating pressure of 250 psi when used with appropriate clamps. Recommended applications include vacuum, coolant, crankcase ventilation and catch can systems. It can also be used for fuel and oil delivery with proper clamps and regular maintenance. Push-On hose is compatible with E85 fuel, oils and coolant, but is not intended for high-temperature applications such as exhaust components or fuel and oil systems that remain filled and stagnant for extended periods.

Braided Flex Hose — Medium Duty

Braided Flex hose is designed for use with Vibrant Performance swivel hose ends for braided flex hose. It has a maximum operating temperature of 300°F and a maximum operating pressure of 500 psi. It is recommended for vacuum, coolant, crankcase ventilation, catch can, fuel and oil-delivery applications. It is compatible with E85 fuels, oils and coolant but should not be used in high-temperature exhaust applications or in fuel and oil applications that remain filled and stagnant for extended periods.

PTFE-Lined Hose — Heavy Duty

PTFE-lined hose is designed for use with Vibrant Performance High Flow hose ends for PTFE hose. It offers the highest temperature and pressure capability of these three hose types, with a maximum operating temperature of 480°F and a maximum operating pressure of 1,500 psi. PTFE-lined hose is compatible with alcohol, methanol, E85 fuels, oils and coolant and is recommended for demanding vacuum, coolant, crankcase ventilation, fuel and oil-delivery applications. PTFE-lined hose is not suitable for natural gas or methane.