nomorews6

iTrader: (7)

I am gonna go with pacesetters or slp long tubes - what would the horsepower difference between single and dual exhaust with a borla cat back?

ibanez7

iTrader: (7)

I asked the same question to a couple of performance shops that are sponsors here. they said unless you running a big block or bored over the single exhaust performs fine and the only diffence with dual is the sound.

Also look at it this way many of the 800+hp turbo ls1 are still on single exhaust!

thats my 2cents. If some knows different cool!

mrr23

iTrader: (3)

don't listen to the performance shops you have. here's the dyno from the wife's car. borla 3" adjustable vs bassani tru-duals. both on stock tune.

Tkami129

iTrader: (3)

Not to be a dick but just givin my 2cents in.........the physics of a turbo exhaust system aren't the same as the physics on a N/A system...

If you plan on doin a camshaft or more with supporting mods(intake, headers, etc.) then I would strongly recommend going with a true dual system. When I bought my car it was already equipped with an outstanding cat-back(GMMG) and I didn't want to put that exhaust to waste so I kept it and ordered headers and a Y-pipe. If the car had the factory cat-back, then I would of definitely went with a dual set-up...
A single exhaust system is typically cheaper then a dual set-up exiting behind the axle, but the dual like the bassani makes more HP.
P.S. get the Pacesetter's over the SLP's
just my $.02

FAST LS1

iTrader: (2)

For a bolt-on car I don't think there's a huge hp gain going with true duals. People have definately gained a measurable amount with true duals on cammed or H/C cars. Even a bolt-on car will gain some hp with a properly sized true dual exhaust over a regular 3" catback.