Setup:
Warpspeed Y pipe -->5th gen cat-->2.5" mandrel bend b Pipe w/Magnaflow 22" Resonator-->5th gen Muffler

Problem is, it sound like the magnaflow makes all the noise under the car instead of spitting it out the muffler. Like there's a huge drone when rolling to a stop sign and lightly stepping on the gas to take off. Its all brrrrrrrrrrrr and little "Go".


any idea's? Here's a clip of the rear, notice little noise is coming out from the muffler, most of it is from under the car. Is this normal for having a magnaflow resonator? Is it mis-matched with the stock 5th gen muffler?

http://www.youtube.com/watch?v=B-0wvw6e5bo

 

Check for a leak maybe?

 

Start cold car. SET PARKING BRAKE! Reach under car and feel around muffler and pipes to see if it is leaking...sounds like it is.

 

fck man, i think its the y pipe again. What else can I use on the y pipe to Manifold end as far as the crush ring gaskets. The ones i bought at autozone don't seem to seal high enough, they fit, but the gasket just sinks in. Are autozone rings thinner than OEM oneS?

Is there a metal gasket I can use on that flange?

 

when you say the "gasket just sinks in" what do you mean?

 

it sits flush with the flange...as in, it BARELY shows any sign of mating contact with the manifold flange.

 

Just get OEM crush ring gaskets. They're not expensive.