Try easy off oven cleaner. really eats carbon and grease Then hot soapy water (sunlight dish soap)
what the head going on?
vehicle? power level.....
will a 1.29" beehive spring sit on the spring seat?
The GM LS6 springs rock and the price is right.
GM#12499224 + comp 787-16 retainers. shim to height and seat -open pressure as required.
Last edited by F-BIRD'88; 07-22-2012 at 05:09 PM.