Just wondering what the power gain if any would be with straight piping my 2003 4.3 silverado?

 

Dont do it....

 

I heard that's like 50 HP...

 

negligible or ~ 1 hp lol, not worth the trouble.

 

And put a Vtec sticker too lol.. Jk
Don't do it.. Trust us...

 

the best mod you can do for the money is an LS swap... not that we just have cash laying around to throw at our trucks. it'll actually sound like a V8, too!

if not, & you don't want as bad of a v6 sound, get a chambered dual-out muffler & use some 3.5x22 tips (or something close to that size). it'll give it a deeper, truck-sounding rumble at idle/low revs

i ran like that (except dumped instead of tails) for almost 4 years & wasn't that bad. i actually had people ask if it was a 4.8 or 5.3

 

well...... I actualy did it like a month ago but i didnt know what kind of gain i would have. I actualy think it sounds pretty good. has a low rumble at idle and is loud as hell above 3000 rpms. It actualy sounds alot like my friends straight piped silverado with the 350 in it.

 

I srsly lol'd

 

well if you're lookin for numbers, i remember seeing where an LS1 T/A with intake/headers & maybe a cam picked up about 10rwhp on a dyno by opening his cutouts to 60%

so i reckon that might put you anywhere between +1hp & -5hp depending on how good of shape your motor's in

 

why would it decrease the horsepower? I was always told more flow more power.