peter_s
Club Member
Yes I know. They make some good stuff!A lot of their stuff is kameari on their higher end builds, pistons/rods/exhausts etc
Here are the specs:
Stage-4 Specifications
Base engine: L28 (N42 head + L28 block)
Bore X Stroke: 89mm (or similar) bore x 79mm stroke 3.0 liter setup. (83mm (3.1L) possible). Special cylinder block modifications. DSI Original crankshaft modifications.
Pistons: DSI ultra light weight pistons
Rods: DSI H-beam rods
Sprocket: Adjustable Cam Sprocket
Crankshaft: L28 crankshaft modified
Cam: DSI proprietary grind Stage-4 camshaft:
Valve train: DSI Big Valves, DSI valve guides, DSI Stage-4 series valve springs & Retainers, DSI Stage-4 Rocker Arms
Gasket: DSI Big Port manifold gasket
Head Gasket: Multi Layered Metal Head Gasket Compression: 11.5 or above