I need to make a new exhaust system for my RX3. I have a Cosmo 13B-RE motor with a big T4. It is a street car so I need the noise to be on the legal side of loud at worst. I am strongly considering using these two muffler for my system. Any opinions?

http://racingbeat.com/FRmazda1.htm


http://racingbeat.com/FRmazda1.htm

 

I'm using them on my Bridgeported RX-3 and love them!! Gotta use them both, but they produce a very nice tone. I've got full 3 inch exhaust from the header back too. Best decision I've made. I ran a dual borla to magnaflow setup in the past and hated it. Very very loud.

 

I have a 2.5 in my 73 RX-3. Dual 2.25 into a RB presilencer into a 2.5 universal muffler with a turn down. sounds good and it has a different tone. I dont know if it will last longer than a magnaflow or aftermarket mufflers. For turbo or bridge, its best to use the 3".

 

Yes, I'd go with the 3" for sure and use a presilencer and main muffler. Are they straight through? I haven't seen them in person.

Glad to hear that they do alright with a bridgeport. That is more severe duty than my application.

 

Yes they are a straight through design muffler. It's amazing how much they tone down the car compared to other mufflers I've tried. But I guess that is why you pay so much for Racing Beat stuff to begin with. The do there homework.