Long tube vs shorty headers

[64nailhead]

The shorties are giving up 15-20hp. But depending on how you intend to use your car and what your 400 is, it probably will not be noticeable for a cruiser. A mildly built 400 should be in the 370-400hp range. On the street it is difficult to identify 370 vs 385. If it's a strip deal, then you'll notice in the time slips.

 

[Supercharged111]

Long tubes make more torque, but last time I found an article on short vs long the difference was absolutely negligible near the 300hp mark. Engine Masters may have covered this as well with a healthier engine.

 

[roger1]

I put Hedman 66609 shorty headers on my El Camino with a '96 LT1 engine. 2 1/2" all through with an X pipe and long case Dynamax Super Turbo mufflers. I could not be any more happy. A drastic power improvement from the stock 305 exhaust system I was using before this.

V band clamps here. Every other joint is welded.

Nothing hangs down to cut my ground clearance:

 

[mamllc]

Roger1, I have what looks like the same headers and cross member that I will be using in an 83 El Camino. Is that exhaust a kit or did you make it up?

 

[roger1]

Roger1, I have what looks like the same headers and cross member that I will be using in an 83 El Camino. Is that exhaust a kit or did you make it up?

It's a Pypes kit.
I documented my install in this thread:

Header and Pypes 2 1/2" X-pipe system install on Elky w/LT1

I just completed this install and I thought it might interest someone here. ('83 El Camino Choo Choo SS with '96 Impala SS LT1 engine/4L60e transmission.) I installed this engine back in 1998 and up to now was running the stock 305 exhaust manifolds and single exhaust. The headers are Hedman...

gbodyforum.com

 

[Injectedcutty]

It's a Pypes kit.
I documented my install in this thread:

Header and Pypes 2 1/2" X-pipe system install on Elky w/LT1

I just completed this install and I thought it might interest someone here. ('83 El Camino Choo Choo SS with '96 Impala SS LT1 engine/4L60e transmission.) I installed this engine back in 1998 and up to now was running the stock 305 exhaust manifolds and single exhaust. The headers are Hedman...

gbodyforum.com

Roger, I just finished up a Pypes install on my Cutlass. Overall it's a really nice kit, but I had to spend an extra $100ish for stainless band clamps and a longer piece of pipe to extend from header to the X. Sounds good too!

 

[mikester]

It's a Pypes kit.
I documented my install in this thread:

Header and Pypes 2 1/2" X-pipe system install on Elky w/LT1

I just completed this install and I thought it might interest someone here. ('83 El Camino Choo Choo SS with '96 Impala SS LT1 engine/4L60e transmission.) I installed this engine back in 1998 and up to now was running the stock 305 exhaust manifolds and single exhaust. The headers are Hedman...

gbodyforum.com

Roger, I just looked through your build thread. You did an amazing job !
The heads you have, are they D port ?

 

[roger1]

Roger, I just looked through your build thread. You did an amazing job !
The heads you have, are they D port ?

Thanks!
Yes. Both cast iron and aluminum head LT1 engines have D port heads.

Edit:
I just browsed the Hedman website. It looks like the oval port version of these headers is 68606

 

[mikester]

Thanks!
Yes. Both cast iron and aluminum head LT1 engines have D port heads.

Edit:
I just browsed the Hedman website. It looks like the oval port version of these headers is 68606

Thanks for that info. They look like they have the same bends. No issues or tweaking them to fit ?

 

[roger1]

Thanks for that info. They look like they have the same bends. No issues or tweaking them to fit ?

None. They fit perfect. Just a very minor change to the shifter linkage that I show a photo of in the other thread.