153 181 4 cyl Performance head 2.5 3.0
As the title says. Performance head for the 153 181 4 cyl engines.
Expect a TQ and HP increase with this head.
New guides installed
Intake valve increased to 1.94
Exhaust valve increased to 1.60
Hardened Exhaust seats
Throat were cut for the larger vales and radius-ed in by hand
HI-FLOW bolt in lump kit installed
Machined for Viton valve seals
Machined for 7/16 roller rockers ( we sell those too)
Stainless steel chromed stems valves. Undercut stems.
Setup with .525 lift capable springs and lite weight retainers.
Head decked .030 to increase compression