903 Series Cylinder Heads

903; Bare (with CNC finished seats and guides)

903A; Assembled

474 cfm Intake; peak flow*

395 cfm Exhaust, w/ pipe (354 cfm w/o pipe)

CNC combustion chambers (84cc), w/ CNC intake/exhaust ports

Cast iron seats – interlocking

Bronze guides

2.42” stainless steel intake valves

1.88” stainless steel exhaust valves

Steel spring seats

Dual valve springs for 0.850” max lift

Teflon oil seals

Steel retainers**

Steel valve locks

3/8” guide plates

* performed at 28” of water, 4.625” bore; intake port bellmouth

** Titanium retainer upgrade option available

Our Price:

$3,499.00 USD

Assembly Options

None
Add +$1,200.00 USD

Titanium Retainer

None
Add +$200.00 USD

Total Price