How best to quieten a noisy 3" exhaust?

C-Gazer · Postby **C-Gazer** » Mon Nov 10, 2014 9:52 pm

RecentlyI installed a new 3" home made SS exhaust using a Magnaflow cat, 14" Magnaflow muffler and resonator on my turbo NB. The set up is slightly more noisy than the old mild steel exhaust it replaced and I was hoping to quieten the setup for street use say with a baffle/ silencer in the tip which I can remove for track days. What have fellow MX-5s done to their systems to enjoy quiet steet driving but have a full flow 3" exhaust for track days? Car Chemistry a US company recommends permanently installing their CC Baffle after the cat to reduce noise and not effect performance Has anyone tried this style of baffle?

chrons_rotary · Postby **chrons_rotary** » Mon Nov 10, 2014 10:19 pm

Either a tip baffle, or get a larger non-straight through rear muffler to replace the current one when on the street.

Postby **Okibi** » Tue Nov 11, 2014 1:28 am

I'm a fan of the varex mufflers but if a silencer will fit that'd be a cheaper option.

16bit · Postby **16bit** » Tue Nov 11, 2014 9:36 am

i have a couple of glass pack tip baffles that work really well but they don't get made any more.

company was stebro but i think they are bust.

if you can find tip inserts they do work, well mine do.

not much help i know!

rascal · Postby **rascal** » Tue Nov 11, 2014 12:49 pm

I had my local exhaust shop add flanges just in front of the rear muffler.
Then made up a second exhaust with super restrictive (ie quiet) muffler.

This way can just swap between quiet & race mufflers with 5 mins work..