9 94excoupe New Member Nov 23, 2009 58 0 0 May 28, 2010 #1 May 28, 2010 #1 i have 99 gtp heads. im using a f303 cam and as i understand i need to upgrade the valve springs. however noone cam seem to tell me which one i need. the summit tech guy was no help does anyone here know which ones i need or where to call.
i have 99 gtp heads. im using a f303 cam and as i understand i need to upgrade the valve springs. however noone cam seem to tell me which one i need. the summit tech guy was no help does anyone here know which ones i need or where to call.
RIO5.0 15 Year Member Feb 16, 2001 6,892 8 128 N.H. May 28, 2010 #2 May 28, 2010 #2 Talk with Mike...he can hook you up no problem. He builds those heads with a spring upgrade. http://thumperoforangepark.com/
Talk with Mike...he can hook you up no problem. He builds those heads with a spring upgrade. http://thumperoforangepark.com/
9 94excoupe New Member Nov 23, 2009 58 0 0 May 28, 2010 #3 May 28, 2010 #3 thanks hopefully he will respond to my email
