Back to Main Tech Support Page
Ask a Question
Technical Questions
Can't find an answer in our Help Center? Submit a question, and we'll get back to you soon.
Need Business/Order Related Support?
Search our Help Center
Get answers to business and order questions from our experienced Customer Service representatives.
Website Feedback
How are we doing? We really are interested in knowing how you feel about DX Engineering. Contact us with your comments - good, bad, great, so-so, or whatever. We want to hear from you!
New at Summit Racing: BBK VariTune Mufflers and Exhaust Systems
It’s true—the performance wizards at BBK have come up with mufflers you can tune to your heart’s content. BBK’s patent-pending VariTune chambered muffler technology is based on an internal Adjustable Power Valve inside the muffler, controlled by a screw adjuster. When the valve is closed, exhaust is forced through all of the chambers of the muffler for a classic mellow sound. Opening the valve allows the muffler to act like a straight-through design, improving exhaust flow and deepening the exhaust note.
You can experiment with the screw adjuster to get the exact sound level you want. What’s more, the VariTune design lets you tune a dual exhaust system from side to side to eliminate undesirable drowning or resonance at low rpm cruise speeds. Try that with another muffler.
The BBK VariTune Mufflers are available in aluminized steel or stainless steel with 2.5, 2.75, and 3 inch offset inlets and outlets. The mufflers are also available in axle-back kits for 2005-2014 Mustang GT and 2010-14 Camaro SS. The kits include two mufflers, 2.75 inch tubing, two 4 inch polished stainless steel tips, and clamps.
SEE BBK’S VARITUNE MUFFLERS AND EXHAUST SYSTEMS AT SUMMIT RACING