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GSC Valvetrain BNI-Bag(S)-in-Box lol
Just want to add..
GSC does not sell dual spring kits.. This kit is fine and has been proven time and time again for 11k+ rpms on s3's. Dual springs are a hassle because you must break in on outer spring then add inner after breakin.
Part# 5041
Mitsubishi 4g63T Evo 1-9 Beehive spring, titanium retainer and chromo Seat
spring pressures : seat @ 1.46'' = 95lbs
coil bind .560'' max lobe lift of .283 or 12.5 cam lift.
GSC does not sell dual spring kits.. This kit is fine and has been proven time and time again for 11k+ rpms on s3's. Dual springs are a hassle because you must break in on outer spring then add inner after breakin.
Part# 5041
Mitsubishi 4g63T Evo 1-9 Beehive spring, titanium retainer and chromo Seat
spring pressures : seat @ 1.46'' = 95lbs
coil bind .560'' max lobe lift of .283 or 12.5 cam lift.