lunati and sdpc valve springs
#2
LS1TECH & Trucks Sponsor
iTrader: (34)
Plenty of people run both...which springs in particular are you referring to though? This way people can give more accurate feedback to you
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800-456-0211 / PM / Facebook
WHIPPLE Superchargers, Procharger, Magnuson, Powerbond Sale, HPTuners packages!, Trickflow, AFR, PRC, CHE Trunion upgrade, $100 7.400" pushrod set, Custom Cam of your choice