I installed this header, (of course the rasp is horrible), if i reuse or buy a new stock tC exhaust gasket will this help at all? I have the Megan exhaust gasket on right now, i just wanted to know whether this would help at all?

 

Probably just going to need another resonator... that would be my guess.

 

when you do a header install you should get a new (toyota) gasket for the install

but no, i doubt your having an exhaust leak, unless you hear the noice from the front of the car... and trust me, you will know what an exhaust leak sounds like. but if all the rasp is coming from the back of the car, add a resonator or two on the car. im not a fan of megan headers... IMO i think they are cheap (quality wise)

 

^---agreed...i bought them to complete my I/H/E setup until i can save up enough for my turbo kit