Systems which can extract the maximum potential from a tuned engine. High revving engine characteristics are made possible with these kits.

In order to obtain more power over step 2 cams and valve springs, cam base radius is reduced and long length lifters are used to increase valve lift. Valve stem seals are also included. Due to the high profile of the cams, cylinder head modifications are required to obtain clearance for the cams. This kit is recommended for use with HKS step 3 pistons.

Suggested RPM Limit: 10,000r/min

Cylinder head modifications are required to obtain clearance for the cams. For maximum results, porting will be necessary. Recommended for use with HKS 87mm bore 22mm pin Step 3 pistons with HKS Step 3 Connecting Rods. Recess modifications are not necessary with the current range of HKS Pistons (Other pistons may require recess modification which is detailed in the instruction manual)

Kit Contents (for 1 engine)

STEP Pro Valve Spring set x1 x1STEP Pro L Valve Retainer set STEP Pro L Lifter set x1 STEP Pro Head System kits do not include camshaft

 

Proven through HKS Race cars such as the DRAG GT-R·DRAG 180SX·T-002, This flagship head system can support up to 10,000 rpm. Lightweight hollow valves made of alloy with sodium allows for great cooling properties, specially designed cams, valve springs and stem seals make up this kit.. Step 3 pistons and specific Step 3 Connecting rods (f22 pin)are recommended for use with this kit. Cylinder head modifications are required to obtain clearance for the cams. For maximum results, porting will be necessary.

? High conductivity valve guides (available separately) can be used to further enhance the performance of the hollow valves.

Suggested RPM Limit: 10,000r/min

Cylinder head modifications are required to obtain clearance for the cams. For maximum results, porting will be necessary. Recommended for use with HKS 87mm bore 22mm pin Step 3 pistons with HKS Step 3 Connecting Rods. Recess modifications are not necessary with the current range of HKS Pistons (Other pistons may require recess modification which is detailed in the instruction manual)

Kit Contents (for 1 engine)

STEP Pro Valve Spring set x1 STEP Pro V Intake Valve ×12 STEP Pro V Exhaust Valve ×12 Valve Stem Seal set ×1 Step Pro Head System kits do not include camshafts.