I am building a iron block 408 stroker engine for my extended cab Silverado.
(Lunati crank. Forged H beams. Diamond Pistons 11:1 compression)

LS3 heads with some light polishing work done
L92 intake manifold with LS3 throttle body LS3 injectors
Comp cam 235/251 .621/.624 113lsa
Comp cam dual springs
LS3 rockers
Ctsv lifters
Ls2 timing chain

She hopefully puts down 500+hp

So now I got to work on the exhuast. thinking about going pacesetter 1 7/8 ceramic coated long tubes. Debating to do 3 inch x pipe or maybe 3inch y pipe to 4 inch back. NO CATS.

Then muffler choices. I want people to know I have a gnarly engine but I don't want to rattle my brain on long drives. The Black Widow race or venom 250 series have caught my attention but they are kinda new to the scene. I have always been a magnaflow (race or oval 4x9) type of guy but dyno number come a little short. And then there's borla mufflers.

Any opinions on my engine build and or personal experience on exhaust selection will greatly be appreciated.

 

If u can afford it.. go corsa... i had corsa on my 408 silverado and it sounded good..before i had true duals with dynomax bullets

 

If it were me, I'd run Speed Engineering 1 7/8" long tube headers, which are stainless steel, with an x-pipe setup. The Black Widow mufflers do sound great, but there are a ton of options out there for mufflers/bullets.