79powerwagon
New member
- Joined
- Jul 31, 2017
- Messages
- 328
Can't find much with search...
Looking for a surface finish spec for 12v head.
Took my head to a race shop which typically does 20-30 ra
Too fine?
*i should add, using stock Cummins HG
Looking for a surface finish spec for 12v head.
Took my head to a race shop which typically does 20-30 ra
Too fine?
*i should add, using stock Cummins HG
Last edited: