World Products Stock Replacement Chevrolet Cast Iron Cylinder Heads

World Products S/R Heads

The S/R is a street replacement cylinder head offered with either a 1.94” or 2.02” intake valve. The 1.94” version is called “S/R” and the 2.02” version “S/R Torquer”. Stock air flow leaves a little bit to be desired for a racing engine. However, if you are interested in adding quite a bit more power to your engine, air flow can be significantly improved with our "S/R UnderCover Porting". A stock S/R head flows 195 cfm intake and 135 cfm exhaust. After our modifications the intake port will flow 225 to 235 cfm while the exhaust will flow around 160 cfm.

Part #	Description	Price
LMS-S/R-UC	Complete World Products S/R heads with "UnderCover Porting". Assembled with flat tappet springs & locators, chrome moly retainers, machined locks, Ferrea 6000 series valves, rocker studs and guide plates. Flat surfaced to your specifications.	2,295.00
S/R-UC	S/R castings with "S/R UnderCover Porting". Bare, pair.	1,595.00
Free Custom Camshaft: Now, with your purchase of a complete set of modified heads and a matching, modified intake, we will supply a custom ground flat tappet camshaft designed specifically for your application. The custom flat tappet camshaft, which normally would cost $185.00, will cost you nothing! Cylinder Head Design Form: Fill out our online form for a recommendation and pricing on a set of heads built specifically for your application. Also, here is a link to more detailed information on our Complete Cylinder Head Assemlies. Cylinder Head FAQ'S Sending your cylinder heads to us for modifications? Brzezinski Racing Products, Inc. The #1 Name in Cast Iron. Call us toll free at 866-236-6300