hey,

i just got a gmpp manifold locally and it looks exacly like the oem one that i got on my car.. is there a stamp or a # or something that tells me that i just didnt pay 200bux for a used stock lsj manfiold?

thanks

 

They look the same... but the inside has been ported and smoothed out...

so if it's still rough feeling on the inside you got swindled!

 

yep, outside should look the same, it's the same exact manifold. like mentioned, the inside should be ported though.

 

even if it is a gmpp manifold u got hosed lol i wouldve either bought aftermarket or got my stock one ported if i was u

 

true.. but it was a good deal for me. 200shipped canadian for it, where i live there is NO market for anything.. machine shops and such are retards and stupid expensive.. plus i've been hunting for a header for almost 2 months now and this was the best that got my attention, plus my buddy just put his zzp combo and his 3inch pipe is raddling agains his frame lol so its stupid annoying.. so i figure gmpp manifold and ca downpipe. gmpp performance exhaust would be a nice sound.

so basically its smoother ports and thats about it.. i assume its an obvious difference in feeling (texture)