ThomasC2

I don't have the undertray on. Do I really need these panels, aren't they just for noice reduction together with the undertray? I mostly use the car on track.

craig001

Those are your heat shields from the exhaust. From the looks of the pieces shown, the cat's heat shield is still in place.

ThomasC2

yeah, the cat heat shield is still there but aren't these panels more for sound than heat?

Will there be any problems running without these? All you guys who track your cars, do you still have these panels in place?

bgiere

Mine are long gone. The 964 cup had the side ones in place when delivered but I removed them...This was about 4 years ago.

springer3

I have seen a Porsche resprayed with cheap paint. Heat from the exhaust blistered the paint on the rear bumpers. The factory paint seems to tolerate the heat pretty well.

Bill Verburg

When i used a 964 engine I used them, still think that they are a good idea, 993 don't come w/ them stock.

There are some nice l/w versions available

bgiere

I don't feel any heat at the rear of the car....the bumper stays cool to the touch...I imagine if you ran the "suitcase" muffler and cat you could heat things up back there...In that case, I'd leave them on.

deep_uv

Mine are gone, but so are the cat and primary muffler. No heat problems so far and most of my car's use these days is on the track. My car doesn't radiate near as much heat from the rear ever since the cat was removed. With no undertray, no cat, everything seems cooler back there.