could i benefit from LT headers and 3" exhaust?

[Foxfan88]

i have 1 5/8 bbk shortie headers with a catless 2.5 H pipe and 2.5 flowpaths dumped.

i got my engine torn down to the block and now would be an easy time to install LT headers (may be able to fish stick the headers beside the engine before i install my heads again. and have them ready to bolt up.)

anyways i could seel my current exhaust as a whole ready to go exhaust and use the money to buy a nice set of LT headers and try to find a deal on a LT h pipe, if not i can weld and wouldnt mind building my own exhaust system for my car.

so at my power level with the blowing making 9 psi would LT headers help me at all, i was thinking of getting the 1 3/4 primaries over the 1 5/8, and should i get the 3 inch exhaust, at the power level i'm at now i dont think it would hurt anything.

 

[85Vertible]

You will gain a little up top with longtubes but I dont think 3" exhaust would help.

 

[5spd GT]

Longtubes will be a benefit.

The 3 inch exhaust will not.

Numerous h/c/i blown combination guys have not seen gains from a 3 inch exhaust.

A larger primary exhaust creates peak torque at a higher rpm.

 

[Foxfan88]

so would i still gain anything just going to the 1 5/8 primary LTs. over my current 1 5/8 shorties??

i looked around and found the cheapest and best way to go would probably be the BBK 1 5/8 primaries and 2.5 collector,

 

[5spd GT]

Yes, I believe so. Maybe not so much up top, but down low a bit.

 

[Foxfan88]

so what would u reccommend, the 1 5/8 or 1 3/4

 

[Fast63]

I think longtubes are a little better, but if you already have aftermarket shorties, I would just stick with that. That is already pretty good flowing exhaust and it will cost you a lot of money to upgrade, enough to where I think it won't be worth it. But if you are going to upgrade to LT's, go with the 1 3/4 primaries and stick with 2.5 piping after it. I hear bbk's LT's are nice.

 

[white99gt]

Longtubes will help esp with a blown app.As far as 3" exhaust its not needed.I made over 600rwhp in my 99 with standard 2.5 exhaust.
THe bbk 1 5/8 should be fine in your case.