[ZR1] increase power on zr1
05-25-2017, 03:32 PM
#1
2nd Gear
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increase power on zr1
how much does long tube headers make in horsepower gain on a zr1? i feel like it is a litel to loud now when i install headers and free flowe cats, is there anything i can do with the mufflers in the back to make it a litel bit more quiet?
05-26-2017, 07:23 AM
#4
Le Mans Master
http://www.superchevy.com/how-to/vem...ormance-parts/
This article says 30 but that includes the tune.
This article says 30 but that includes the tune.
The power gain is from the tune
