Likely more weight yes. This would be a street car though without much power, so I'd like as much clearance as I can get, plus avoid having hot exhaust bits being close to things like the tranny and diff. I also was able to grab an RX8 resonator and some spare piping when I worked at Mazda, plus a friend had a full 2.25" setup on his S/C'd 318i, then switched back to a factory exhaust and gave me the old one (including a cat) since it was obnoxious.

Dont think I'd ever want more than 250rwhp with it, and thats a bit of a stretch as it is. I shouldnt be dicking with it at all, as its my DD, but I've already acquired a big pile of 2.25" piping. I'm not going to replace the factory stuff outside of the Magnaflow catback I already have, because I'm very happy with it and I think its the best sounding N/A sub 2.0 4 cylinder I've heard. I like my low end power, so I'd just lose more of it by installing it now.

If you got a welder than 3" exhaust sounds great however if u dont and someone else has to make it for you.. it will be bad as it will knock everywhere.

My exhaust was made by a monkey with a welder at the local exhaust shop... it was rubbing everywhere until i went back and bitched them out.. then halfway through emissions time came and when i hooked up the stock ecu i realized the rear sensor is dead because they hooked it up sideways and the wires got ripped by the driveshaft...

At last 150 or something for cat, another 120 for muffler and another 100 for a resonator + i think 100something for fabricating it = lot more than a cutout. You dont even need a giant cutout, a 2" cutout will be plenty.

real head turner for sure...cops are all over my ass (in more ways than one)

https://www.miataturbo.net/attachmen...ine=1339161996


I just think cutouts are stupid and pointless. They add complexity and defeat the purpose once they open. You can make a turbo miata near silent with the right exhaust choice with little damper on performance output.

Everyone says they want it to be quiet, but then if you get into boost all hell will break loose and you'll be screaming at 100dB making a few psi going up a hill; that's retarded stupid. I can't even hear my exhaust when I'm curising around...even in boost, only if I go maybe >20% TPS.

that screams STREET RACER

lol bro you don't like revving at ladies?

Did you see the MJ decal....think about what you just said.

Honestly my biggest reason for wanting the boost cutout is to eliminate the need to fabricate a full exhaust.
I also don't see whats so complex about it: just a EWG on the end of a downpipe with a vacuum line going to it.
And what is this magical list of parts you speak of? cat + resonator + biggest magna?

just noticed.

omg u r gey

Search for patsmx5's exhaust setup on here and m.net. That is a quiet setup.

:giggle:

That is pretty good! a friend of mine was on a budget and has just modified his mk1 manifold and turned it in to a turbo manifold, looks crap as its a mk1 manifold but works alright for a budget setup :)

Will be keeping an eye on this thread!

nice name hoe

That's a 3" pipe? Guess I'm used to looking at 3.5"s and my obnoxious 4" Magnaflow. I meant more the fart cans, chrome tips, etc. that I often see, and obviously not just on Miatas. I think black ceramic coating would look even better

link for lulz

Sounds like me!


This is a most important function and should not be overlooked in a well designed system! :drool:



I agree. The cutout opening should be selectable. I plan that with the low boost map it stays shut so 7psi through stock downpipe, cat and exhaust . With the high boost map it will open once you loose vacuum.
High / low boost selected by widow washer stalk so finger tip control for lady reving and other critical situations:rofl:

http://forum.miata.net/vb/showthread.php?t=334403

This one?

I literally just said "what the ----" out loud

https://www.miataturbo.net/attachmen...ine=1339180863

:rofl: yep

looks like he clamped too hard on some anal beads and straightened them out

my exhaust


louder IRL but reasonably quiet. 3" + big'ol 5x11x22 magnaflow. No cats :party:
free flowing enough to shed turbine wheels out of the exhaust.