Mazda Competition Exhaust Install

The Mazda Competition Exhaust arrived in the mail from Mazdaspeed Motorsports Development. Shipping costs were only 20 dollars. After tax, it came out to be 211 dollars. It looks good. Stainless steel exhaust with good bends. The pipe diameter is 2.25". The muffler is much smaller than the OEM unit and the whole exhaust is much lighter. According to the mazdaspeed statement, shipping weight about 15 lbs. The OEM unit is close to 21 lbs. The exhaust is made by Bosal. This exhaust is commonly used in Spec Miata, but Springfield Dyno exhaust is the top-shit exhaust over there with even less bends, more power, and lighter weight (around 12 lbs) than the Mazda comp exhaust. It is too loud for my application so this exhaust will do.












Removal of the exhaust is very simple. Two bolts connecting it to the catalytic converter (in my case, cat delete test pipe) and three rubber hangers. The rubber hangers are very old in my car and was not that stiff, so removal was very simple.

A friend of mine has the same exhaust with a cat converter. His car wasn't too loud, though it does get kind of loud under load. Without the can converter it is louder. Idling is fine, and reving it produces a very sharp noise. Car revs and drops revs much faster than before. Under load I suspect the car will get quite loud. Not looking forward to the freeway noise.

Note: The burn damage on the bumper is from my stock exhaust tip being cut my the previous owner. The tip ended before the bumper. I think he might have done that to further quiet down
the car.

Next up is seat install and RX-7 AFM install. The RX-7 AFM install will involve some fiberglass for minimal underhood modification and use with stock intake, so stay tuned!

Copyright 2009, 2010 (c) by Jerry Lee.