The Dart Big Block Chevy Pro 1 Aluminum Heads were inspired by Dart's championship-winning Pro Stock designs and available with 310, 325, 345, or 355cc oval or rectangular port intake runners, big block Pro 1 aluminum cylinder heads deliver out-of-the-box airflow that smokes the competition! Specifically engineered for street performance, bracket racing and Super Eliminator engines yet can be used with off-the-shelf pistons, valve train components and intake manifolds!
Race-Proven Pro 1 Features:
- Advanced manufacturing techniques provide precision castings
- Combustion Chamber Size: 121cc
- Extra-long intake valves & rolled valve angles
- Magnesium bronze valve guides reduce stem wear & extend cylinder head life
- Multi-angle intake seats & radiused exhaust seats dramatically increase airflow
- Hardened exhaust seats compatible with unleaded gasoline
- Exhaust ports raised .300"
- Requires 1" longer head bolts next to exh ports. Use: ARP 070-135-3605
- Spark plug holes machined for gasketed 3/4" reach plugs
- Sold as a pair
WARNING: This product contains a chemical known to the State of California to cause cancer and reproductive harm. See https://www.p65warnings.ca.gov/ for details.
