Old style vs new style rpm heads

There are a difference in Edelbrock RPM heads made before 3-15-2002 and after. Here we show you the difference.

 

Heads made prior to 3-15-2002 have a deeper bolt hole

Head Bolts- ARP-190-3604

Head Studs- ARP-190-4304

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Heads made after 3-15-2002 have a shallow bolt hole

Head Bolts- ARP-190-3605

Head Studs- ARP-190-4305

This will help identify which RPM heads you have so you can order the correct head bolts or head studs.