It depends on what other mods are done to your car. If you have your heads ported and a cam, they are going to yield you more power than a stock motor would. On a stock motor i would say about 15, and on a modded motor up to 25.

 

On MAC's site, they list 28.4 rwhp gains. Anybody know if this is on a stock motor or modified?

 

Was that done on a dyno? That sounds like a lot of hp to the rear wheels especially if it is a stock motor.

 

doesn't say

 

Here's a link:

http://www.macperformance.com/store/...ategory_ID=567

 

I got my mac midlengths jet hot coated in & out for 561 shipped. That includes y-pipe and everything, I believe you have to get a seperate y-pipe for LTs

 

When I ordered my Jet-Hots last July they were $540 coated to my door. The Hookers were like $650 to my door at the time. The prices may have change now though....

I believe the header in that pic are LS1 headers. Look at the bolt pattern on the gaskets. LT1's blot pattern is straight accross...

 

Yes, they are "coated" with something...LOL I can tell you that it's not very rust preventative, though.
You can have them Jet-Hot coated for an extra cost.

Frank

 

I actually read that they do their own ceramic coating now. It's pretty expensive though.

 

Yeah... How much and what is cheaper HOOKER's or JET HOT's, or should I just look into PACESETTER's LT's..Or would the Mac's really live up to LT potential. Cause I'm going to do cam, heads, gears, the works later. Don't want to have to spend another $500 or more on another set of headers. Looking at the 306 cam..

 

LOL...Did you check my sig.?

Frank