ProMaxx Performance Products Cylinder Heads SBF Maxx 180 180cc Intake Runner
9175HF
The SBF Maxx 180 is an as cast head that beats the competition. Don’t let the size fool you, flowing over 260 cfm, this head makes real power. It puts out up to 20 hp over the competition.
- 180cc Intake runner
- Ultra-smooth 356-T6 Aluminum casting
- Precision CNC machining
- 5 angle valve job
- Hand Bowl Blended
- Unshrouded chamber
- Diamond honed Bronze guides
- Large spring pockets
- Multiple spring options
- Professional assembly
- Assembled heads feature 21-4N back cut swirl polished 1 pc valves, 3/8 studs and adjustable guide plates
- Machined and Assembled in the USA
Technical Specifications:
Combustion Chamber ……60cc
Weight …………………………55.00 lbs.
Intake Runner ……………. 180cc
Exhaust Runner …………..66cc
Intake Valve Size …………2.02”
Exhaust Valve Size …….. 1.60”
Spring Pressure
Hydraulic Flat Tappet .575 max lift
Closed ………………….. 115 lbs. @ 1.800”
Open ……………………. 310 lbs. @ 1.225”
Hydraulic Roller .600 max lift
Closed …………………… 145 lbs. @ 1.800”
Open …………………….. 325 lbs. @ 1.200”
Solid Roller .700 max lift
Closed …………………… 235 lbs. @ 1.900”
Open …………………….. 600 lbs. @ 1.200”
******* other options available******
Valve Guide ……………Manganese Bronze
Valve Seal Material … Viton
Retainer Material ……Steel
Valve Job ……………… 5-angle
Head Bolts……………. ARP 154-3701(302)/154-3603(351W)
Valve Spacing ………. OEM
Stud Girdle………. Jomar 1123 – 7/16″
Valve Seats ……………Hardened Steel
Intake Gasket ………. Fel-Pro 1262
Exhaust Gasket ……. Fel-Pro 1415
Head Gasket ……….. Fel-Pro 1011-1 (68-82) 1011-2 (83-95)
Spark Plug …………. .750” Reach Gasket Seat
Torque specs …….. 80 Ft lbs. 3 increments using 30wt oil