Thread: helpful advise please?

Ok a 2.5 down pipe is a waste go 3" or not at all
There are a lot of 3.4 threads on here and a ton of used parts on here clubgp and gpona
your better off just doing it the right way the first time around Look into headers Yes you can keep your cat

You really don't have to get a downpipe, the u-bend is the most restrictive part of the exhaust so if you get rid of just that you should be good to go for the mods you want

and the idea has been ditched, thanks does anyone have this :ZZ Performance how does it effect your performance?

and from what i have been reading it seems like the front header is the most restrictive, is there any problems with just upgrading the front and leaving the back?

Originally Posted by corsagtp

You really don't have to get a downpipe, the u-bend is the most restrictive part of the exhaust so if you get rid of just that you should be good to go for the mods you want

The u-bend IS the most restrictive, but that was still an extremely stupid statement. To drop to a 3.4 you will need at least a 3" downpipe, intake, tune, colder plugs, 180tstat. Just get the 3" catted dp from zzp and dont waste your money on the 304 stainless because the standard will still probably outlive the car. If you plan on ever modding past a 3.4 setup you might as well not waste the money on a downpipe and just get headers because beyond 3.4 they are a must. Oh, and these cars sound like complete **** with the resonator removed, just leave it. There's a thread in the general tech section called safely modding your 3800 powered car, you should check it out. The ceramic pipe is useless, and is only for use with their front powerlog anyways. If you realy want to open up the exhaust don't waste your time and money on downpipes/powerlogs/crossovers, Pontiac Performance Racing Products for International Sales from SSAutochrome Inc. these headers fit great on these cars and are pretty cheap. This would be ALL you need and the exhaust will be done no matter how far you mod.

Read. Best advice I can give you. My Safely Modding Thread tells you all of that.

Then all you need is headers/tune/intake of some sort/180* T-Stat/Autolite 104's...and if you want...a ported blower and TB. To be HONEST, if someone knows their sh1t you can probably get away with a 3.4" with just headers and a damn good tune.

downpipe and a 3.4 would work too. the tune would be the hard part.

Originally Posted by Bio248

downpipe and a 3.4 would work too. the tune would be the hard part.

This. Shouldn't need headers if you're not going past the standard 3.4 setup. There's a guy selling a 3" zzp stainless for 60 bucks in the for sale section which is a sick deal, you should check it out.

I'm just saying that since the price of a DP/PLOG NEW is almost as much as a set of headers nowadays...I'd get headers...for the little price difference...the performance gain and flow ability is well worth it.

Send it to Brian (Reptile).

You'll benefit form lower outlet temps, more whine, and with hte TB ported...it'll have better flow/throttle response. Plus, with the better flow...it'll lower KR...since the temps are lower.

Originally Posted by BwolfGT

The u-bend IS the most restrictive, but that was still an extremely stupid statement.

I meant to say with a 3.5 pulley but I forgot to put that in, I know you need to run a 3.4

a 3.5 pulley is very, very close to a 3.4 pulley in terms of boost produced.

Just get a set of the speed daddy headers and drop to a 3.4