Edelbrock part #2058 Performer RPM Top End Kit is designed for 1965-76 Big-Block Oldsmobile 400-500 c.i.d. V-8 engines. This Top End Kit produced 450 HP & 541 TQ on a 455 c.i.d engine with 9.5:1 compression. The kit delivers improved performance in street applications from 1,500 to 6,500 rpm range. This kit includes an RPM intake manifold, Performer RPM cylinder heads, hydraulic cam and lifters, timing chain complete bolt kits and an Edelbrock gasket set. To get great performance out of any engine, all of the components must work together. For over 30 years, the Edelbrock Total Power Package system has solved the parts matching puzzle for many street performance enthusiasts. With the introduction our Power Package Top End Kits, now you can get the best Edelbrock performance in-one-box, under one part number with "no guesswork" involved.