headers

**kyemt** · 07-23-2007, 10:19 AM

ok im thinking about getting long tubes but im wodering do they really flow that much better than the factory manifolds, i mean they look like a shorty header, are the long tubes worth the investment. I know they dont give the 30 advertised hp the manafacture says, how much do u guys think 10hp 20 hp??

**05gtoautoX** · 07-23-2007, 12:26 PM

I would probably say between 20-30hp, honestly I felt quite a bit of difference although I added OR mid-pipes at the same time, mine dynoed at
348RWHP stock and 374RWHP after, all on a dyno-jet. mines also got a good custom tune and a volant CAI

**kyemt** · 07-23-2007, 02:26 PM

im prolly going get some pace setters because there in the budget, how hard was it on the goat?? and i would love 20 extra hp my slp diablo has teh slp tune already which has headers in it so i should be ok

**05gtoautoX** · 07-24-2007, 12:38 PM

The passenger side went really easy for me, like 45mins total, but the drivers side was a bitch, I had to drop the rack and pinion and jack up the engine, it took me like 6 hours.

**Silver Bullet** · 07-26-2007, 11:48 AM

Yeah me too. Go Kooks you won't be sorry with there header and yeah msot deff 20-30 hp with a professional tune

**starcheif** · 07-26-2007, 07:32 PM

Is there any differernce between the ls1 stock exhaust manifolds and the stock ls2 exhaust manifolds as for as putting a pair of ls2 exhaust maifolds on my ls1 would it make any difference at all and would thy bolt right in ? Thanks for any input

**Silver Bullet** · 07-26-2007, 08:00 PM

why are you messing with them? Just doing an 04 to 05 convt I assume. and no there shouldn't be a problem but i'm not 100%. If the 05-06 header will fit then why not the stock exhaust manifolds

**starcheif** · 07-26-2007, 09:07 PM

No i was just wondering about getting more performance out of the stock ls2 exhaust manifolds vs the stock ls1 exhaust manifolds for my ls1 04 GTO. I found a used pair of ls2 stock exhaust manifolds for sale and was wondering about hp increase or if its even worth doing. I know the JBA shortys are the same for the 04s to the 06s as far as direct bolt in so i would assume the exhaust manifolds would be as well but assumption is usally the mother of all F***ups. At least for me it is anyways lol.

**Silver Bullet** · 07-26-2007, 10:13 PM

I don't think it would do much other than maybe change the sound. Save up and by some LT's then you'll find true happiness

**starcheif** · 07-26-2007, 10:24 PM

Yeah i know i wish the only ones i found that are legal are the jba shortys for ca. but i havent really looked into putting high flow cats after the long tubes to see if that would be legal or not for ca. I was also thinking about running the jba shorties with some electric exhaust cutouts that would sound friggin nice a little less horse than the long tubes but no need for a cat back system when youre running open exhaust. Isnt our exhaust 2 1/2 inch piping as well does anybody know?

**kyemt** · 07-27-2007, 05:52 AM

for visual inspection the 04 05-06 look the same but i dont know if theres a difference, a quick way to find out for sure would be, do a search on parts america for an 04 and an 06 see if they have the same part numbers, im going long tubes some day