Drag Illustrated Issue 148, September 2019 | Page 112

A Block, A Head
of the Rest
PAT & LIZZY MUSI
BBC PRO1 20˚ 451cc CNC
BBC BIG M Race Block
Why waste time and money on a tired factory block? Instead, build a
better big block with Dartʼs Big M. Features such as 4.500-4.600in bore sizes,
priority main oiling, and ultra-strong 4-bolt main caps make the Big M
extremely durable and the perfect building block for extreme horsepower.
The PRO1 20° 451cc utilizes 451cc, CNC-ported runners in a conventional
asymmetrical port design, and features a 20° rolled valve angle with
redesigned shallow combustion chambers. With nearly 500 CFM of airfl ow
available on the intake side, these heads are ideal for maximum-effort
naturally aspirated, big-boost power adder, or nitrous applications.
CHAMPIONSHIP ENGINE COMPONENTS
248.362.1188 | DARTHEADS.COM