Some one one this board was kind enough to advise me to get a Borla presilencer to quiet down my SE. Can someone give me a part number for a suitable Borla product? The Speed Shop guy says he can help if I know what one I need.
Anyone help?
Thanks,
Mike

 

https://www.rx7club.com/1st-generation-specific-1979-1985-18/quiet-yet-straight-through-exhaust-possible-541547/
You mightt find that in this thread

 

racing beat makes headers, presilencers, ehaust manifold replacements, or cat replacements...its what the majority of us use.

www.racingbeat.com

 

use a borla "turbo" muffler, and get it from summit, cheap and comes to your door.

 

The rb cat replacement is a rip off imo. Borla seems to be really good. I think tranquil has a borla pro xs. He says its preety good. You can find them on ebay.

 

If you're running stock SE intake ('6'-ports), then you're going to need that feedback tube that's normally part of the main cat. The Mazdatrix presilencer is simply a RB unit that's been modified with the proper feedback tube in place.

I have this setup on my SE and it works great, operating the '6'-ports at right about 3800 rpm like clockwork.

84-85 13B 6-port GSLSE Part# 16402 @ www.Mazdatrix.com

Looks like this:

 

If you don't want to do that, you can mount an airpump (like for bike tires) along with a RPM switch that will activate it at a specific RPM. There is a writeup in the 2nd gen section.