NTIMD8

Hey guys, Anyone know the diameter of the stock Catback system?



Thanks, J

j9fd3s

its prolly 60mm, 3" works great

NTIMD8

Anyone know for sure? Is it 2 1/4"?

Fd3BOOST

I thought ot was 2". I couold measure one I have lying around if you need it that bad. What do you want to know for?

NTIMD8

Well I do not need to know "that" bad. If you happen to walk by your old exhaust with a tape measure in your hand that would be cool.



I found an unreal deal on a 2.5" system and with the muffler flowing far more than the stock unit I am thinking it will support the power I want to run.

SPICcnmGT

2" would seem kinda small I would say atleast 2.5", but if I was going to replace it I would go with 3" probably.

teamrj83

everything to go 3" on your car is pretty cheap, 2.5" might be more just cause there isnt many using them on there cars just a thought... but heck a cat back on these cars almost always use 3" so might as well go there too it wont hurt anything unless you just hate 3"???

1Revvin7

I bet the internet norm in a few years is going to be 3.5, then 4" is another 5 or so...

NTIMD8

For my set-up I would rather stick to a 2.5" SS system with a nice flowing muffler. My mods are going to just basic upgrades and this system should give me less back pressure while keeping boost creep at bay. I found s System that used to sell for over $1100 CDN for $225 CDN shipped to my door!!!!! Long story behind how I got this pricing and I will get into the details later but basically it is from a company I used to have an account with before I sold my Company (Speed Shop). If the kit is as good as the rest of this companies exhausts I will post the info for other RX-7 owners who want to go this way for a deal of a lifetime. Heck even if someone wanted to replace the OEM system because they needed one this would be a much cheaper way togo!!



,Jason

j9fd3s

thats what the hot rod crowd did. back in the day they thought a 2" dual was cool

but now they run dual 5"