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  VW Parts Catalog > Engine Parts >

Dual Port Cylinder Heads, 40 x 35.5mm Valves, 500-420 (per PAIR)
Dual Port Cylinder Heads, 40 x 35.5mm Valves, 500-420 (per PAIR)
Photo shows two angle views of head. Product is priced/sold PER PAIR.
 
Dual Port Cylinder Heads, 40 x 35.5mm Valves, 500-420 (per PAIR) are a GREAT deal on a pair of Big Valve heads for that engine project you are going to do! These are complete with Valves, Guides, Springs, Keepers, Retainers, bolt them on! Chambers "out of the box" are APPROXIMATELY 59cc. If you want a different chamber volume, please choose the "CC" option.


Price is for a PAIR of cylinder heads to do one engine. These heads come unported, they can be used as is, or ported for more airflow and power.

Choose from HD Single or Dual Springs, to properly match your cam and rocker arms that you will be using. You only need HD Single springs for cams up to around 290 advertised duration (Engle 110, SCAT C-35, etc). Bigger cams than this will need Dual Springs. If you use an Engle 110 or SCAT C-35 with 1.25 rockers, you will need DUAL SPRINGS!

These heads use a 12mm x 3/4" spark plug.

These heads are a good choice if you are building a mild engine with a non-stock cam, since you would need to buy new HD Springs and Chromoly Retainers, removing the stock stuff. Why pay for stuff you are going to take off an not use? Use these instead, they have that already! Big Valve Heads can only be successfully used with engines that have 1 1/2" or larger exhaust systems, which also means the stock heater boxes can NOT be kept! If you use stock heater boxes or 1 3/8" exhaust your engine will be difficult to tune, and will run much hotter from exhaust back pressure holding heat in the heads!
Price: $539.95


: 500-420-PR

Choose Head Bore Size

Head Bore Size:
Choose Valve Springs


Specify your Head Combustion Chamber Size

Specify CC: 		[adds $30.00 per head] optional

QTY:
Overview
 
Dual Port Cylinder Heads, 40 x 35.5mm Valves, 500-420 (per PAIR) are a GREAT deal on a pair of Big Valve heads for that engine project you are going to do! These are complete with Valves, Guides, Springs, Keepers, Retainers, bolt them on! Chambers "out of the box" are APPROXIMATELY 59cc. If you want a different chamber volume, please choose the "CC" option.


Price is for a PAIR of cylinder heads to do one engine. These heads come unported, they can be used as is, or ported for more airflow and power.

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