firehawk00

Just like it says, post some numbers. I had a friend tell me LS1's are only gaining about 16rwhp out of em. That was so disappointing I hope someone can prove him wrong.

blkZ28spt

Only 16 rwhp? What is wrong with 16 rwhp? Some of that depends on whether or not you already have a cat back, if you use cats, or if you go to duals, but 16 rwhp out of just headers is not bad. Especially since you have to consider that most people don't normally get a tune after headers and already had a cat-back. Sure, it'd be nice to get at least 20+ rwhp and a lot do, but 16 rwhp is probably a fairly common gain for LT headers on an LS1. The thing about a full exhaust with LT headers is that they don't really shine until you mod the engine. LT's will allow you get get maximum possible power out of a modded engine.

soliari

I have Jet-Hot LT's which are same design as hooker.

I got +18 RWHP and +15 RWTQ through a catback ... and that was over gutted cats and a cutout. Really good in my opinion

redz_02

iTrader: (4)

Borla and a lid on an M6 gave me 330 rwhp and 344 rwtq. Figured with the LT's I can pull about 345 or so on.

whitecamaross

99 camaro ss here and i dynoed 328 rwhp with hooker long tubes, magnaflow cat back, off rd y pipe. i also had a lid, filter, bellow..i also had bent pushrods as well. totally untuned. i gained about 15 rwhp. also, how much did you think you were gonna gain with lt's?? oh i think you are probably one of those people that believe in 30 hp gains. yes it is 30 hp at the flywheel!!!! not at the wheels!
now i have put a cam and pushrods etc, and my headers appreciate that because of the extra exhaust being pushed out. 15 rwhp is average for long tubes. if you are not planning on doing anything internally speaking then buy shorties. they are much better than long tubes on a internally stock engine. trust me i know what i am talking about.

BlackTA

iTrader: (1)

Haven't gotten mine dynoed yet, but I ran a 13.6 before headers, and a 13.7 after, no traction problems either time. But I have a huge exhaust leak from my gaskets (damn jet hot pieces of ****), and its making me run extremely lean. I've also heard that tuning after long tubes can get you another few hp at the wheels, maybe even 10 rwhp, depending on how your engine is running prior.

DVST8OR

iTrader: (7)

+25 rwhp

Pacific Muscle Cars

I had the Hookers on my last car ('02 Z28 M6).

Before - lid only
310 rwhp
328 rwtq

After - Hooker LT's, ORP, catback and A/F adjustment with MAFT
349 rwhp (+39)
360 rwtq (+32)

blkZ28spt

What do you mean by that? LT's would make more power.

big dave

My 99 6 speed baselined at 296 with a lid. Made 313 after headers and ORY. 320 tuned. 328 with cutout open.

SSTYCOON

iTrader: (2)

A magazine did the Hooker Lt's and ORP install and got 16 hp, Popular Hotrodding?

firehawk00

Yes, he showed me the magazine. 16rwhp equal about 19hp at the fly, the exhaust they replaced in the magazine were stock exhaust manifolds but it looks like they had off road pipes and after market y pipe. I guess the hp gain was all headers. 19hp at the fly for lt headers still seems a little low for me (IMO). Just ?ng because I just installed Flowtech’s which are also the same design as the Hookers, I was hoping to gain more hp than that. I do have and after market cam. Check my sig.

soliari

I wouldn't worry about how much peak hp gain you got from manifolds. The headers will help everywhere on the curve.

Also, after you dyno your car, let us know how much you obtained. As you can see from the posts, everyone gets different results.

jamnut

iTrader: (4)

True shorties aren't going to give you hardly anything over a good set of 01 or 02 manifolds.

Mid length's are ok, but Long Tubes are the best way to go. Please explain yourself. Maybe you can convince me otherwise, but if you can't I would appreciate it if you wouldn't give out misleading information on these boards.