Small Bore Small Block owners sometimes get the short end of the stick when it comes to good cylinder heads. Everything is always catering to the 4 inch plus bore guys so when Edelbrock introduced these new Performer RPM heads for the small bore guys we were pretty excited. After all, who doesn’t love a high revving 283? And they also work on all 305 and 307 based combos. Now we know these aren’t the most popular small blocks to build, but that doesn’t mean you can’t have performance with yours if you want it. We think this is a great new offering. Here is all the info from Edelbrock.
New Performer RPM Cylinder Heads for Chevrolet |
| TORRANCE, CA (September 14, 2018) Edelbrock is expanding its line of small-block Chevrolet cylinder heads to include the new Performer RPM Cylinder Head designed specifically for small-bore engines. The new Edelbrock Performer RPM Small-Bore Cylinder Heads are engineered for use with 265, 283, 305 and 307 c.i.d. small-block Chevy engines produced from 1954-2003 with bore sizes less than 4.000 inches. To accommodate the smaller bores, valve spacing on these heads have been reduced to 1.817 inches while maintaining the early-style Gen 1 (1959-86) valve cover bolt pattern so that you can use your favorite small-block Chevy valve covers. These new Performer RPM heads also retain the stock straight spark plug angle and exhaust flange bolt pattern for ease of use with factory-style exhaust systems. Edelbrock Performer RPM Small-Bore Cylinder Heads are legal for use on pre-pollution-controlled vehicles only. Available bare (#61009), with springs for flat-tappet (#61019) or with springs for hydraulic roller camshaft (#61015); these heads can also be used with larger-bore engines if desired. Like all other Edelbrock Performer RPM series cylinder heads, these feature a thick 9/16-inch deck, extra-thick port walls, high-flowing ports, ductile iron seats, one-piece stainless-steel valves, and high-quality rocker studs. Edelbrock cylinder heads also feature state-of-the-art compact combustion chambers and highly efficient ports that offer improved performance and great throttle response throughout the rpm range. Other top-quality features include threaded inserts for rocker studs and exhaust bolts for superior strength and durability, as well as manganese-bronze valve guides. These cylinder heads are designed in-house, cast from A356 aluminum, heat treated to T-6 specs, and machined in Edelbrocks Southern California USA manufacturing facilities for unsurpassed quality and performance. For more information on these new heads and to view a complete spec chart, visit www.edelbrock.com |
I could have used these a few years ago. I built a 283 for my daughter’s Camaro.