I have just order slp's whisper lid with a k&n air filter and I was wondering if I am going to be able to fell a difference once installed? Also my friends have a 97 stock ws6 a4 and a 99 Z28 with flowmasters and a4. When these two cars race one will win one time and the other will win the next time just whoever lauches better. Once I get my lid on I plan on ordering a ram air hood and a cat back exhaust. How much space should this put between me and a stock ls1?

 

The lid helps out plenty, and with a catback it is an awsome combo. I have the wisper carbon fibre lid with a borla catback, didn't notice a SOTP feel b/c i put it on the car the week i got it. I would say about 10-20 rear wheel with a good cat-back and a lid.

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'02 Red Z28, ebony leather, M6, T-tops, Trac. cont., hurst shifter
-Borla (the expensive cut-out)
-Wisperlid W/K&N
-FRA
-Cags eliminator
-Strange 4.10's
-G2 Rear Girdle
-Valv. Synthetic 10W-30
-Redline gear oil
-Fat hurst shift ****
-Lead foot
Soon to be:
Alpine Screen, Orion xtr 800.4, xtr 900.2, Kicker 12L7 in a milhouse, Focal polykev K2's.

 

Will that 10 to 20 extra horsepower be noticed in a race?