Dart 18° heads use the same readily available components as most 18° designs. The difference is that Dart delivers the features that put you ahead of the competition. We've refined the rolled valve angle design to give our customers more versatility, more performance, more reliability and higher quality.

It is recommended that you contact a Dart technical representative before placing an order for this item. Detailed information about your planned engine build will help to ensure that you choose the right configuration for your motor and that any special parts and considerations are taken into account.

Features:
- Premium alloy: Dart aluminum heads are cast from virgin 355-T61 aerospace alloy for superior strength and integrity.

- Shallow combustion chamber design improves combustion and allows use of larger valves for improved air flow.

- Interlocking ductile iron valve seats are compatible with stainless steel and titanium valves.

- Valve seats will accommodate up to 2.200" intake valves and 1.625" exhaust valves to maximize flow.

- Valve centerlines with standard 1.935" spacing for optimum valve locations with different bore sizes.

- Spark plugs are shifted toward bore centerline to enhance flame travel and reduce spark plug advance requirement.

- Refined intake port design reduces turbulence and improves air/fuel flow.

- Tall short side radius and deep valve bowl enhance low lift flow.

- Extra thick decks for 9:1 engines can be milled for high compression engines.

- Dual exhaust bolt patterns are drilled for standard 18° and spread port header flanges.

- Water passages between exhaust ports improve cooling and prevent "hot spots" that can cause head gasket failure.

- Gasketed 3/4" reach spark plugs offer widest selection of heat ranges.

- Integral bosses can be drilled for fuel injection down nozzles.

- All cylinder heads sold individually.