goombadi99

Is there really any gain running shorty headers? Anyone have a set installed?

Vetteman Jack

Shorty headers like the B&B brand do provide a power gain over the stock exhaust manifolds, but it is not a significant gain like with long tube headers. Still, it is not a bad mod if you want a HP bump.

StrangelovesM6Vert

They sound better than thick cast iron manifolds.

c5vetteguy

And, of course, they're lighter.

NemesisC5

Your factory cats are the biggest bottleneck. If you can get by with removing them go LT's no cats. Texas Speed and Hinson are advertising LT's on here for prices comparable to shorties. Or install a cat-less Y from Breathless Performance to your factory manifolds for an inexpensive increase in power and sound. I did on my 99 Coupe many many years ago and along with drilled factory airbox, K&N filter and Hypertech (that tells you a lonnng time ago) canned tune dynoed 336/341 to the wheels. Added headers and custom tune and it dynoed 344/347 to wheels on same dyno same day. My point is that on a stock internal LS1 the factory exhaust manifolds and no cats performed well and although the LT's and tune gained a few hp/tq the $2,000+ for Kooks LT's/X-Pipe and LS1 Edit tune were not a cost effective purchase. Later with AFR heads and baby Comp Cam I gained over 50 hp/tq to the wheels. Added blower then dynoed 606/506 and I"m certain the LT's were a bigger contributor to the total package.

0260N5

can you explain more about this catless y setup?

NemesisC5

Link provided below, one picture worth a thousand words...

http://www.breathlessracing.com/inde...&productId=879

3 more pictures...

http://www.breathlessracing.com/prod...?productId=879

Weld in place, turn off your rear O2's for no CEL and your good to go.

goombadi99

Awesome thanks for the tip. This may be the way to go.