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[2c5s]

Originally Posted by Inferno LS3

Yes they do. Ask RedHT from HeadTurners. His car was on a dyno after he installed his cut outs. It was a stock engine and made consistently 5-7RWHP less with the cut outs open. Have you dynoed a stock tuned Camaro with cut outs both closed and open back to back?

Just curious, did you actually log the car and see the counts of knock?

[Inferno LSX]

Not sure. It was a dyno day event. Tuner said it looked like the car was pulling timing with them open. Said if he ever custom tunes the car they can make the KR less sensitive. Hey strange things happen all the time.

[2c5s]

Originally Posted by Inferno LS3

Not sure. It was a dyno day event. Tuner said it looked like the car was pulling timing with them open. Said if he ever custom tunes the car they can make the KR less sensitive. Hey strange things happen all the time.

Did you guys dyno it back and forth , open and closed?

[Inferno LSX]

Yes, the last dyno run was with them closed and the car picked back up some of the RWHP. Look if the OP wants to install cut outs more power to him... or not. I personally think they make a car sound like crap. It doesn't sound like a muscle car with out a cam.