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. Dont 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