Announced July 9, 2013
Chevrolet Performance announces the launch of the new and improved Circle Track Crate Engine (CT400), p/n 19318604, to the Chevrolet Performance Parts Program.
The foundation is the same, sturdy iron block with four-bolt mains, a forged crankshaft and high-strength pistons, but enhancements have been made. Chevrolet Performance customers will find their 8604's coming with the new cylinder head which features "blue" beehive-style valve springs. The engine is easily identified by the Chevrolet Bowtie logo on the end of each head, formerly identified with the GM Performance Logo.
CT400 - Circle Track Crate Engine
Part Number # 19318604
Note: All measurements were taken with Chevrolet Performance components. Use of any other type of components may yield different results.
Fast-Burn Head Asm:
Part Number # 19300955
If Customer has an 88958604, the following can be used to upgrade:
This is a Chevrolet Performance product.