I've been looking at header & downpipes for my '07 SS/SC but can't make up my mind. What are you running & why do you like it? I'm wanting to go with a 3" no cat downpipe & 3" custom catback exhaust.

Give me some ideas...

 

what are all of your mods? i wouldn't go with a full 3" exhaust unless i was around the 290-300whp range.

 

Currently I have GM stage 2, Injen CAI, ZZP big front mount heat exchanger, dual pass & 2.5" catback

 

If you plan on running a 2.7" or 2.6" pulley on the m62 with other supporting mods, then you may as well go with the 3" exhaust or if you plan on going Turbo or TVS with your car. If you do not have any plans like that then you won't need a 3" exhaust as you'll probably just be losing WHP.

I would recommend the CIA (Clear Image Automotive) H/DP Combo. Gasketless setup with GREAT workmanship and welds. It fits perfect and I doubt you'll have any trouble with it like you may see on some of the other combos out there.

Just my .02.

 

CTI header and downpipe

or the Vibrant Header and downpipe kit...

Long tubes FTW!

 

you will lose power with a 3" cat back..

a 3" downpipe with a 2.5" cat back would be a good setup for you.

I have the mid length / 3" dp from clear image for sale if you are interested.

 

for now i would stick with your 2.5" catback and just buy headers and a downpipe so you dont lose too much backpressure. you can run a 3" downpipe fine though. im going to get a vibrant header/dp combo, the downpipe is 2.5" tho. If your set on getting a 3" downpipe i would check out the cti header/dp combo or get some CA headers with an xtc downpipe. here are some links. the CA headers are on ebay for like $215 by the way. I'm not sure why cobalt-addiction has a higher price for them listed on their website.

http://cobalt-addiction.com/performance.htm

http://www.ottperformance.com/Cobalt...duct_info.html

http://www.turbotechracing.com/produ...dcategory=5617

 

^^ Back pressure has nothing to with it.. Actually... back pressure is bad.

How can it be a good thing if you have air BACKING UP... you want to flow as much air as possible... and since back pressure is a restriction.. back pressure is bad...

switching to a 3" cat back makes you lose air velocity, which is important... the faster air can get out, faster new air can get in...

 

Back pressure is bad scavenging good

good read http://www.ssheaders.com/header.htm

i want to run a 3" exhaust just for the deep sound, but i dont want to kill savaging , id like the find the optimal length and size the down pipe needs to be, then from the downpipe back run 3".

as far as the best header...who knows , someone should do a comparo of all the mid length. the pacesetter is best bang for buck.The clear image seems to be best quality/bang for buck, and i think they have the only full length (other than wepon-r)

 

Eventually I plan on going with 2.8" 60#'s meth & wet NX system with a 50 shot.

 

i should hav said air flow instead of back pressure. i meant that if his exhaust is too free flowing that he would lose alot of low end

 

You won't need a 3" exhaust..

If you go with a CTI H/Dp you may be waiting awhile on them as they take for ******* ever.

ZZP's primaries on their header make it a complete bitch to put the stock studs back in without having to grind a little bit off the stud to make them work nicely.

Basically they will all get you the gains you want. I had the ZZP h/dp for a while and then I went with the CIA h/dp. Same Performance. I just think the CIA is of better quality, nice welds, etc..

 

i didnt read the posts so excuse me if this has been said.

JBP came out with a new header, its beautiful and sounds excellent. almost 600 bucks tho.

 

can we say over priced?
im sorry but i just cant see some tubes and welds costing that much. i understand you have to pay for th research and people have to make money but i mean come on.

 

***FLAME SUIT ON***
in my opinion...and will remain my opinion till i see concert proof of its gains(stock dyno,vortex dyno same car) i think
JBP VORTEX =


its theory is sound until you add fluid dynamics.

 

i would kick my own ass if i spent over $600 for the jbp header when you can get a header/dp combo for much less

 

People lost whp on that header.. I'm not sure what the under the curve hp was or what the gains were, but I know at peak.. If I recall correctly, people lost peak whp from previous dynos with other exhaust setups.

 

it might be desinged for rediculous stupid fast 600whp cars???

 

That header is FARRRR from being new.

That header is just retarded... People say how wonderful it sounds.. but it does jack **** for performance.

 

yes it does... anything different than stock makes better flow and power

 

Obviously.

I paid 312 for my header AND a downpipe, and got wayyy more hp than that thing would have given me... which is HALF of the price of what that thing is.

 

I paid 380 for mine, and I love it, it performs more than everybody thinks, most dis it because they sont understand it and it cost alot

 

They dont understand it...?? lol...

It might gain.. but ALL the other headers.. gain way more...

In fact.. the pacesetter header is just about the best header to get.

 

i understand it...its just a stupid idea to Begin with.
its a long tube header, point of long tube max gain. but its designed to fit like a shorty. point of shorty header? to keep the stock down pipe and cat. your not gonna get max performance with stock DP and cat, so you end up buying a new DP and high flow, or ditch the cat all together , which defeats the point. so you spend 400 bucks + x amount for DP and your still not gonna see the same gains you would see with a normal header. pulse just to add insult to injury its a pain in the ass to install.

it may physically be equal length , but fluid dose not like to change direction, when it dose charge direction it slows down ,with all those different bends you end up more uneven exhasut pulse than you would with unequal length manifold. what proof do i have?
the fact its made of equal length pipe but sounds like a damn boxer engine. if you don't want to give up your stock cat/DP, your better off with normal shorty. as said befor the theory is sound if you dont take into account fluid dynamics.