Why purchase your Edelbrock cylinder heads in a total box stock format when there are some small changes that can boost performance by as much as 50 horsepower. These heads while nicely done by Edelbrock have some weak areas that can quickly be improved upon. Using a pair of bare heads we perform a true competition valve job, chamber de-shroud, backcut the intake and exhaust valves, fit the heads with our r-1valve springs, and set the valve guide clearances. Once the modifications are performed the heads are than flow tested to verify the performance on our flow bench.

Features

• Combustion chamber - 58cc
• Intake runner volume - 176cc
• Exhaust runner volume - 75cc
• Intake valve diameter - 2.02"
• Exhaust valve diameter - 1.60"
• Valve stem dieter - 11/32"
• Valve guides - Manganese bronze
• Deck thickness - 5/8"
• Valve spring diameter - 1.46"
• Valve spring max lift - .580"
• Rocker studs - 3/8"
• Valve angle - 18 degree