With a perfect test fit and finalized quality control checks we are now taking PRE-orders for our Shorty Header and Aluminzed Downpipe.

This top quality ‘shorty’ header is the best value in the LSJ aftermarket. Designed by a G.M. airflow guru, it produces 5 to 7 more horsepower than the stock exhaust manifold on a slightly modded car, and more as you add boost. It will fit fine with your stock downpipe, the INTENSE™ 3” aluminized downpipe or any other aftermarket downpipe that fits with the factory exhaust manifold.

Our downpipe will fit fine with your stock exhaust manifold, the G.M.P.P. extrude-honed manifold or the INTENSE™ Shorty Header. The entire downpipe is 3” in diameter, and two outlet size options are available. The 2.5” outlet bolts right up to stock or 2.5” aftermarket cat-back exhaust systems, and the 3.0” outlet mates perfectly to 3.0” aftermarket cat-back exhaust sytems.

These items should ship September 18th, 2006.

 

Will this header work on a 2.4l auto?

 

We have not test fit it on a 2.4 or really even looked into it so I don't know for sure.

 

I'll buy one and test fit it if you guys take it back (and pay return freight) if it doesn't work.

Sound like a deal?

I'll also report ease of fitment and butt dyno power gain as well.

I plan on getting it dyno'd after it's installed, but I won't have a before to compare it to... That is unless you guys are willing to pay.

I'll be using the XTC B-pipe w/cat because you guys don't offer a high-flow cat version yet.

Or do you?

 

What size is the flange at the collector?

 

Man you vendors are on a roll lately

 

Very nice. I like how the O2 bung is located in the colector portion, not in a single primary like most of the others.

 

Ok, This 5-7 HP that you claim.....Are you basing that on a completely stock car with just the header being added?

What kind of gain do you predict for a Stage 4 car with a 3" DP and Exhaust?

 

bump for this question.

 

It is the stock size, you can do a direct replacement with our header.

 

wheres the Catalytic Converter?

 

On your website you said it adds 5-7hp on a lightly modded car, whats a lightly modded car?

 

No CATs for their downpipes bro!!! It can be done though.

 

must not be any emissions up there

 

Whats the stock size becuase Im going to use someone elses downpipe?

 

bump for anyone who knows what stock size is?

 

The stock size of the exit hole at the manifold's flange is 2 1/4." However it narrows down to 1 3/4" at it's most restrictive point.

 

The Intense header has a 3" outlet but the flange is the same as the stock one. just has a 3" hole in it instead of 2.25". This should bolt to all factory replacement down pipes