DESCRIPTION

KEY FEATURES

• Advanced Vacuum Actuation: Equipped with an ultra-responsive pneumatic vacuum actuator for quick-action valve operations, ensuring superior thermal durability compared to electric motors.
• Smart Vacuum Control Module: Complemented by a high-output blue control pump box and two metallic 3-button wireless remotes, supporting simple dynamic cabin acoustics customizability with ON, OFF, and AUTO functions.
• Premium T-304 & 201 Structural Options: Available in cost-effective steel grades or ultimate weather-defying stainless steel options, finished to a mirror polish that elevates under-chassis aesthetics.
• Optimized Scavenging Efficiency: Drastically drops engine exhaust backpressure when fully open, amplifying throttle response, mid-range torque, and total horsepower gains.
• Airtight High-Precision Seals: Thoroughly machined internal butterfly valve flaps guarantee a complete airtight seal when locked shut, eradicating annoying highway cabin drone.

TECH SPECIFICATIONS

• Brand: WANMAX RACING
• Product Type: Universal Vacuum Valved Performance Exhaust Muffler Kit
• Fitment Type: Universal Fitment (Cutting, custom pipe bending, and welding mandatory)
• Available Connection Pipe OD: 2.0" (51mm) / 2.5" (63mm) / 2.75" (70mm) / 3.0" (76mm) / 3.5" (89mm)
• Material Variants: Polished 201 Stainless Steel / Heavy-Duty 304 Stainless Steel
• Valve Mechanism: Pneumatic / Vacuum Chamber Actuated
• Control Input Voltage: 12V DC (Powered via vehicle lighter adapter socket)
• Kit Layout: 1 x Integrated Valved Muffler Assembly + Complete Control Kit

VEHICLE FITMENT

• Universal Application: Seamlessly accommodates a vast array of domestic and import sports cars, sedans, trucks, and SUVs built with space to accommodate a performance center/rear muffler body, or any build executing a custom valved exhaust conversion.
• Important Note: This is a weld-on fabrication kit. It is not a vehicle-specific bolt-on configuration. Professional automotive shop measurement, pipe cutting, and expert welding are strictly required.

MEASUREMENT CONFIRMATION

1. Pipe Outside Diameter (OD) Check: Use a digital caliper to measure the exact Outside Diameter (OD) of your mid-pipe or existing rear exhaust inlet line. Select the matching size from our variants: 2", 2.5", 2.75", 3", or 3.5".
2. Muffler Cavity Space Check: Check your vehicle’s underside and bumper rear cutouts. Measure the physical width, depth, and height clearance near your stock muffler area to ensure this valved assembly fits cleanly without touching suspension arms or plastic body panels.

WHAT'S IN THE BOX

• 1 x Polished Stainless Steel Valved Muffler Assembly (with Integrated Vacuum Actuator)
• 1 x Intelligent Vacuum Pump Control Box (Blue Housing)
• 2 x Premium 3-Button Wireless Remote Key Fobs
• 1 x Heavy-Duty High-Temperature Blue Vacuum Silicone Hose Roll
• 1 x 12V Cigarette Lighter Power Supply Cable Harness
• 1 x Brass Connector & Fitting Hardware Pack

INSTALLATION GUIDE & PRECAUTIONS

1. Mock-Up Positioning: Safely hoist the car. Support the valved muffler underneath the vehicle chassis pockets to accurately map out custom pipe routing and check clearance.
2. Custom Weld Fabrication: Cut out the factory restrictive muffler. Weld the new inlet and outlet lines smoothly onto your exhaust tract. Professional TIG or MIG continuous bead welding is mandatory.
3. Vacuum Hose Plumb: Connect the high-temperature blue silicone hose to the vacuum brass nipple on the actuator. Run the other end safely through a floor rubber grommet into the vehicle interior.
4. Control Module Hookup: Secure the blue control pump safely inside a dry cabin environment (like the trunk corner). Link the blue silicone hose to the pump nozzle and plug the 12V harness into your car's lighter socket.
5. System Operation Check: Start the engine, toggle the remote control buttons, and confirm that the vacuum butterfly valve responds immediately.

• Thermal Mitigation Protocol: Ensure the blue silicone vacuum hose is tucked and tightly zip-tied far away from the hot muffler casing or exhaust pipes. Melting the hose will create a vacuum leak, causing the valve to malfunction.
• Keep Control Box Isolated: The blue vacuum box must stay inside the trunk or cabin. Do not install it under the chassis where it faces direct rain, water puddles, or flying gravel.

TROUBLE-SHOOTING GUIDE

• Q: The remotes fail to activate the system, and the blue control box displays no signs of electrical life.
  • A: Verify that the 12V adapter is firmly pushed down into the socket and your vehicle’s accessory ignition is on. Unscrew the front locking tip of the cigarette adapter plug to check if the internal glass fuse has ruptured; swap it with an identical amp fuse if blown.
• Q: The box powers up and pump hums, but the valve actuates very slowly or fails to open fully.
  • A: Inspect the blue silicone hose run. Check for sharp kinks, pinches from body panels, or hot spots where the line may have melted against the exhaust pipe. Ensure the brass connector ends are clipped on air-tightly.
• Q: There is an exhaust ticking rattle or puffing leak sound when the valve is clamped tightly shut.
  • A: Visually check all newly welded seams around the muffler connections for micro pinholes or weak welds. If the welds are intact, inspect inside the valve throat for any internal weld splatter or road debris preventing the flap from resting perfectly flush on its machined internal seat.