getting a new exhaust tomorrow - what tube width works best?

snellgrove · Post by **snellgrove** » September 2nd, 2005, 1:13 pm

Hi guys, I've just been searching but can't find a real definitive answer (or anything even like one)

So, basically I'm getting a cat-back system fitted tomorrow (mostly for the noise, i'll admit it.. I'm not going all-out on performance because at the end of the day, its just a cat-back!!)

but... if there are any performance gains to be had, i'll take them! im getting a custom made system done (not crush bends either

)

The engine itself is a completely standard 1.8 / V6, the JMZE I believe the VIN starts with.

any recommendations? do I keep the piping relatively small, or do I make it go large?

Post by **Custommx3** » September 2nd, 2005, 1:17 pm

They say 1" per liter is the best. But Id go to 2.25" if your staying with the stock motor.

lakersfan1 · Post by **lakersfan1** » September 2nd, 2005, 2:25 pm

Agreed. No larger than 2.25"

jschrauwen · Post by **jschrauwen** » September 2nd, 2005, 3:08 pm

lakersfan1 wrote:Agreed. No larger than 2.25"

Ditto

bmwm3guy · Post by **bmwm3guy** » September 2nd, 2005, 3:16 pm

Custommx3 wrote:They say 1" per liter is the best. But Id go to 2.25" if your staying with the stock motor.

what about an 8L V10 Viper GTS?

an 8" pipe eh? jk

I agree.. no more than 2.25... even 2 would be more than enough for the tiny 1.8L

Nd4SpdSe · Post by **Nd4SpdSe** » September 2nd, 2005, 3:41 pm

bmwm3guy wrote:
Custommx3 wrote:They say 1" per liter is the best. But Id go to 2.25" if your staying with the stock motor.
what about an 8L V10 Viper GTS? an 8" pipe eh? jk

Remember man, dual exaust....I belive they use dual 3"

Personally, I'd say 2" on a K8, unless your planing to do a 2.5 swap in the future, 2.25 wouldn't be a bad idea

snellgrove · Post by **snellgrove** » September 2nd, 2005, 4:14 pm

ok, I think i'll just go for 2" or something, - as long as thats bigger than standard anyways

Post by **Custommx3** » September 2nd, 2005, 5:07 pm

If your doing any mods, Id go with 2.25".

If not, then leave it stock. If your only going up .2 inches, its pointless.

snellgrove · Post by **snellgrove** » September 2nd, 2005, 5:22 pm

it has a 1.8" as standard then?

I dont think I'm going to change anything soon, the KLZE would be awsome at one point but I highly doubt i'd get round to that, and theres all the effort of getting a good one etc etc.

hgallegos915 · Post by **hgallegos915** » September 2nd, 2005, 7:56 pm

hey not to jack the thread but.. what about for a 2.0? Im getting my exhaust custom made ..no kat converter no egr I do want to keep at the middle muffler. It makes it loud enoug but not as loud as rice.