1958-65 Chevrolet "W" Series 348/409 Large port Performer RPM Complete Cylinder Head (Each)

Looking for a boost in performance from your vintage 348/409 Chevy? The Edelbrock Performer RPM 348/409 Chevy cylinder heads were designed for the 1958-65 Chevy W Series large port big block engines. Aluminum head with original port locati ons and valve angles for bolt on convenience. Complete with CNC port matched intakes and exhaust ports for optimum flow and performance. Port design has been improved to provide even more performance. Complete with hardened spring cups screw-in rocker s tuds and hardened guide plates. Equipped with springs for use in hydraulic flat tappet camshaft applications.Specifications:220cc intake runner volume115cc exhaust runner volume2.19 intake valve diameter1.72 exhaust valve diameter11/32 valve stem diameterManganese bronze valve guides9/16 deck thickness1.55 valve spring diameter0.600 valve spring maximum lift7/16 rocke r studHardened steel guideplate3/8 pushrod diameterStock exhaust port location14mm x 3/4 reach gasket seat spark plug fitmentMade in the U.S.A. Gaskets and head bolts not included but are sold separately.For head gasket use Part # E7359For intake manifold use Part # E 7240For exhaust manifold use Part # E7241Top end gasket set (Head Intake Exhaust and Valve Cover) use Part # E7378For head bolt set use Part # E8581Also sold as a pair. See Part # E60819 and save! Important installation notes: Use Edelbrock head gasket sets only. May be used on 348 engines with valve lifts up to .550 only. These heads will only fit 1958-65 348 cid W engines i f an Edelbrock # E5409 # E7159 or stock large port 409 cid manifold is used. Proper cylinder wall notching must be checked to ensure exhaust valve to cylinder clearance. 1958 348 c.i.d. will require customer modification to cylinder head to ensure proper sealing of water jacket (Click here for instructions). Note: Shipped overweight. No further discounts apply.