185cc Aluminum Cylinder Heads Small Block Chevy

Vehicle Info Needed

PROMAXX PERFORMANCEPART NUMBER: 723-2171

185cc Aluminum Cylinder Heads Small Block Chevy

Name: 185cc Aluminum Cylinder Heads Small Block Chevy
Brand: PROMAXX PERFORMANCE
SKU: 723-2171
Price: 1135.00 USD
Availability: InStock

^$1,135⁰⁰

Ships on Sep 17, 2026

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185cc Aluminum Small Block Chevy Cylinder Heads

Small Block Chevy
2.02''/1.60'' Valves
185cc Intake Runner
72cc Combustion Chamber
Straight Plug
Assembled
Sold as pairs

Technical Specifications and Recommended Components:
Combustion Chamber - 72cc
Weight - 55.00 lbs
Intake Runner - 185cc
Exhaust Runner - 62cc
Intake Valve Size - 2.02"
Exhaust Valve Size - 1.60"
Max. Valve Spring Lift - .575" Hydraulic Flat Tappet
Spring Pressure - Closed 115 lbs. @ 1.800", Open 315 lbs. @ 1.225"
Valve Seal Material - Viton
Valve Guide - Manganese Bronze
Retainer Material - Steel
Valve Job - 5-angle
Head Bolts - ARP 070-134-3601
Valve Spacing - OEM
Valve Seats - Hardened Steel
Intake Gasket - Fel-Pro 375-1206 or 375-1266
Exhaust Gasket - Fel-Pro 375-1404
Head Gasket - Fel-Pro 375-1004 or 375-1094
Spark Plug - 750" Reach Gasket Seat

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

High-Performance Aluminum Cylinder Heads

ProMaxx Performance Small Block Chevy Cylinder Headshave a cast aluminum construction with straight or angled spark plug ports anda variety of intake port runners, combustion chamber, and valve sizes to takeyour performance engine build from mild to wild!

Part TypeCylinder Head

Product LineProMaxx Performance Small Block Chevy Aluminum Cylinder Heads

BrandPROMAXX PERFORMANCE

Package Height9.4

Package Width11.8

Package Length24.8

Weight54.05 PG

Part CategoryPerformance Parts

Cylinder Head MaterialAluminum

Intake Port LocationStandard

Exhaust Valves IncludedYes

Locks IncludedYes

Retainers IncludedYes

Lock StyleStock

Guideplates IncludedYes

Rocker Arms IncludedNo

Oiling StyleThrough pushrod

Rocker Arm Nuts IncludedNo

Cylinder Head FinishNatural

Valve Seats MachinedYes

Maximum Valve Lift0.575 in (14.605 mm)

Valve Seat MaterialDuctile iron

Heat CrossoverNo

Valve Springs IncludedYes

Spark Plug StyleStraight

Valve Seat Machine Style5-angle

Damper Spring IncludedYes

Valve Guides IncludedYes

Cnc-Machined Intake RunnerNo

Intake Valves IncludedYes

QuantitySold as a pair

Valve Stem Seals IncludedYes

Intake Valve Diameter2.02 in (51.308 mm)

Accessory Bolt Holes DrilledYes

Exhaust Runner Volume (Cc)62

Exhaust Port LocationStandard

Valve Guide MaterialManganese bronze

Outside Diameter Of Outer Spring1.27 in (32.3 mm)

Combustion Chamber Volume (Cc)72

Machined For O-RingNo

Steam Holes DrilledNo

Rocker Arm Studs IncludedYes

Cylinder Head StyleAssembled

Part FitmentSemi Universal

Valve Cover Mounting StylePerimeter bolt

Retainer MaterialSteel

Intake Runner Volume (Cc)185

Cnc-Machined Exhaust RunnerNo

Cnc-Machined Combustion ChamberNo

Exhaust Valve Diameter1.6 in (40.64 mm)

Vendor Part Number2171

Package Qty1

Package TypeEA

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