HKS exhaust
#1
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HKS exhaust
Im going to be getting the HKS Hi- Power exhaust for my baby (GS400) and am planning on going full custom piping. What size piping should i go with???
#4
Lexus Test Driver
The pre-fabricated HKS Hi-Power for the GS400 are 60mm inlets. If you go with larger, you'll be creating a bottle neck (which may be ok because it'll keep some of the backpressure you'll be getting rid of with the large piping).
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