ProMaxx Series One 175 SBF Bare Heads

Fits Vehicle SBF

The series 1 175cc SBF is an economical head that has all the right stuff. This head will make your SBF come to life. They have been on track tested weekly in a dirt late model. Put track-tested performance in your small block Ford at a price that cannot be beaten!

Features:

• Bare Heads
• 175cc As cast Intake runner
• Ultra-smooth 356-T6 casting
• Diamond honed guides
• Multi-angle valve job
• Precision CNC machining
• Multiple spring options
• Machined and assembled in the USA
• Sold In Pairs

Flow Chart

Flow Data @ 28″ water

lift 100 200 300 400 500 600

Int 70 136 192 233 257 267

Ext 66 119 155 176 190 199

Technical Specs

Combustion Chamber ……60cc

Weight …………………………55.00 lbs.

Intake Runner ……………. 175cc

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 Specs*****

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

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

Weight	50 lbs
Dimensions	24 × 12 × 12 in

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