Me and my brother (who is a LS1 owner) have been arguing about how much RWHP you can get from LT headers. My car is mostly a bolt-on car right now so how mush RWHP would I get from a par of jet-hots LT headers.
I am saying about 25-30 RWHP and he is saying like 15 RWHP.
How mush power do you get from LT headers I told him 15RWHP was more like shorties.

 

there is no desiganted power number that goes along with any modification including exhaust, just tell him it will be enuf to tell they are on there

 

I'm betting somewhere between 15-20 RWHP (trying to be realistic on this one.)

 

I've seen dyno sheets ranging from 20 rwhp to 28 rwhp on a mostly stock car, but most are between 20 and 25 rwhp.

 

It all depends on your set up. If you already have a cam in then you could see as much as 35-40....most people get around 20-25.