News > News Archive > First Generation 4 PBS competition heads

One of the first Generation 4 PBS competition heads, ready for "bolt on". Fullrace preparation with a ultralight valvetrain,stainless steel, flow optimized valves in 31,4 - 27,4mm with 5mm stem. Titanium Retainers, note the small valve lash caps in the groove of the retainer. The spark plug is relocated and is now 2,5mm closer to the piston deck.
The intake manifold is machined to take two 40-45mm horizontal carburetors, like Weber DCOE. A flow test coming soon, also a dyno check.

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