83turbo

Moroso Spiralflow worked well for me - I don't think it can be that restrictive because my turbo (60-1) response didn't suffer at all (although I do have a cat

in front of it). It does a good job getting the "boominess" out of the exhaust. I

have a straight through type muffler after it that silences the higher pitched tones.

Dramon_Killer

Dangit, rotary exhausts are so expensive to put together. Any good ideas for a quiet cheap custom catback exhaust or does that not exist?

Rob x-7

dynomax and borla sytems

mazdaspeed7

If you want quiet, keep the stock cats. Other than that, that was the whole point of this thread...

j9fd3s

ive heard a couple cars with the old (black) rb turbo back and an intake and it was silent, quieter than stock

CrassFC3S

i want to hear more about that new apexi muffler i forget the name but it has a piston so at low throttle its more restricted and not as loud but when youre at high throttle it opens up completly and is loud and non restrictive

Dramon_Killer

Yeah exactly.



Why do our cars require so many freakin mufflers...



MS7: How much did your entire setup cost you?

mazdaspeed7

The mufflers were about $350, and I spent another $50 on the tubing and mandrel bend I used. I already had the collector from my last exhaust, as well as the header. But both are in the process of being redone and I expect that to add another $100 or so in materials. It took me about 14 hours total to do that exhaust as it is now, and Ill probably put another 8 hours into the new header. I cant wait to have a vband instead of that cursed 6 bolt flange RB uses on their headers.

j9fd3s

haha, thats a lot of fun isnt it

marcus7

I have "a cat" (a Random Technology main cat). Using the RB header, that cat, and the OEM muffs - above 4500 RPM it's unbearably loud. The RT cat does absolutely nothing for noise suppression.



My son can literally hear me from half a mile away. Can anyone assuredly say that $400 worth of RB NA cans quiet it down, or is it a lost cause? I have to keep at least one cat. The state of California has a unique way of meeting the "budget crisis" - fine the hell out of you for any infractions they can. Is it just me, or is there something wrong with the term "infraction" being synonymous with a $1500 fine?