Roush Exhaust Manifold Leak/Blown gasket, help please!

[Yoballs83]

2000 S281 SC, Series I
90MM Mass Air, Demolet Meter Forward, 70 MM TB, 42 #, Chicane Fuel Pump, Spec Stage II Clutch, SCT Tune.

Here's the deal.. under slight to full throttle while in gear, under load, I hear a pretty distinct noise coming from the motor. It sounds as though as its directly behind the radio/center console area. The noise is hard to describe.. it sounds as though its a soft grinding noise almost but not really. I only hear it when the car is under load, but like i said.. it will begin at slight throttle.

I'm making pretty decent power.. 320hp/360 tq to the wheels (dynojet). As far as boost.. i'm seeing between 5-7 pounds. Any help is appreciated!

Johan
00-646

 

[2000xp8]

Sounds just as you've stated in the title.

Header gaskets, open the hood, stick your head in there, and manually rev the engine, sound should be pretty clear.