Technical Specifications and Recommended Components:
Combustion Chamber - 64cc
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 375-1405
Head Gasket - Fel-Pro 375-1004 or 375-1094
Spark Plug - 750" Reach Gasket Seat

Specifications:

Accessory Bolt Holes Drilled

Yes

CNC-Machined Combustion Chamber

CNC-Machined Exhaust Runner

CNC-Machined Intake Runner

Combustion Chamber Volume (cc)

Cylinder Head Finish

Natural

Cylinder Head Material

Aluminum

Cylinder Head Style

Assembled

Damper Spring Included

Yes

Exhaust Port Location

Standard

Exhaust Port Shape

Square

Exhaust Runner Volume (cc)

Exhaust Valve Diameter (in.)

1.6

Exhaust Valves Included

Yes

Guideplates Included

Yes

Heat Crossover

Intake Port Location

Standard

Intake Runner Volume (cc)

185

Intake Valve Diameter (in.)

2.02

Intake Valves Included

Yes

Lock Style

Stock

Locks Included

Yes

Machined for O-Ring

Maximum Valve Lift (in.)

0.575

Oiling Style

Through pushrod

Outside Diameter of Outer Spring (in.)

1.27

Quantity

Sold as a pair

Retainer Material

Steel

Retainers Included

Yes

Rocker Arm Nuts Included

Rocker Arm Studs Included

Yes

Rocker Arms Included

Spark Plug Style

Angled

Steam Holes Drilled

Valve Cover Mounting Style

Perimeter bolt

Valve Guide Material

Manganese bronze

Valve Guides Included

Yes

Valve Seat Machine Style

5-angle

Valve Seat Material

Ductile iron

Valve Seats Machined

Yes

Valve Springs Included

Yes

Valve Stem Seals Included

Yes

Manufacturer's Part Number:

2168

The ProMaxx Performance Small Block Chevy Cylinder Heads are manufactured from cast aluminum and are offered with straight or angled spark plug ports, a variety of intake port runner, combustion chamber and valve sizes to work on all of your performance engine builds from mild to wild!

Features

All New Parts and Castings

Accepts Perimeter Bolt Valve Covers

Stainless Steel Valves

3/8" Screw-In Studs and Guideplates

Sold In Pairs

JEGS EZ Kits are designed by JEGS professionals to ensure that you get all the correct parts you need.

2168 - ProMaxx Performance Small Block Chevy Aluminum Cylinder Heads is rated 4.0 out of 5 by 1.

Rated 4 out of 5 by Jimpat from like them This product is just what I had expected, good looking product.

Date published: 2014-11-04

can you reach over 430 hp with these heads, do you know what roller cam will fit these heads, also do you get both cylinder heads for 843.99?

Asked by: fello

This is a pair of heads and yes you can make more than 430 HP with these. This is the limitation of your cam choices - Max. Valve Spring Lift - .575" Hydraulic Flat Tappet

Answered by: Rusty B

Date published: 2018-04-10

could i use these on my 94 chevy with center bolt vavle covers thanks

Asked by: farm

These are perimeter bolt only and will not work with centerbolt covers.

Answered by: Jon Jegs Tech

Date published: 2018-02-08

Are these heads able to be used with a solid flat tappet cam shaft /

Asked by: pappy s Camaro

The springs will have to be changed for the solid lift cam.

Answered by: Jon Jegs Tech

Date published: 2018-02-08

Can this head run self aligning roller rockers (Comp Cams 1617-16)

Asked by: Harvick4

Yes, but you would want to remove the guide plates if you are using self-aligning rocker arms.

Answered by: Rusty B

Date published: 2017-12-04

Can you run a hydraulic roller cam with these

Asked by: Jaybird1

The valve springs would have to be changed for a hydraulic roller.

Answered by: Jon Jegs Tech

Date published: 2017-12-01

Will these fit older gen 1 chevy motor ?

Asked by: freddyNH

Yes, these head will work on a gen 1 sbc.

Answered by: BrandonJ

Date published: 2017-11-17

how many rps is this good for.... iwant a 350 or a 383 with a redline of 7k

Asked by: mikeyb

With the valve springs included on this heads for up to .575 lift hyd cam, 6500 to 7000 max suggested RPM

Answered by: Jegs Tech

Date published: 2017-11-07

are the valve springs suitable for flat tappet cams?

Asked by: 72302

Max. Valve Spring Lift - .575" Hydraulic Flat Tappet

Answered by: Jegs Tech

Date published: 2017-11-07

2168 - ProMaxx Performance Small Block Chevy Aluminum Cylinder Heads Questions - page 2

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ProMaxx Performance 185cc Aluminum Cylinder Heads Small Block Chevy

Part Number: 723-2168

ProMaxx Performance 2168 Details

Specifications:

can you reach over 430 hp with these heads, do you know what roller cam will fit these heads, also do you get both cylinder heads for 843.99?

could i use these on my 94 chevy with center bolt vavle covers thanks

Are these heads able to be used with a solid flat tappet cam shaft /

Can this head run self aligning roller rockers (Comp Cams 1617-16)

Can you run a hydraulic roller cam with these

Will these fit older gen 1 chevy motor ?

how many rps is this good for.... iwant a 350 or a 383 with a redline of 7k

are the valve springs suitable for flat tappet cams?

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Customer Care

Help

JEGS Online

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ProMaxx Performance 185cc Aluminum Cylinder Heads Small Block Chevy

Part Number: 723-2168

ProMaxx Performance 2168 Details

Specifications:

can you reach over 430 hp with these heads, do you know what roller cam will fit these heads, also do you get both cylinder heads for 843.99?

could i use these on my 94 chevy with center bolt vavle covers thanks

Are these heads able to be used with a solid flat tappet cam shaft /

Can this head run self aligning roller rockers (Comp Cams 1617-16)

Can you run a hydraulic roller cam with these

Will these fit older gen 1 chevy motor ?

how many rps is this good for.... iwant a 350 or a 383 with a redline of 7k

are the valve springs suitable for flat tappet cams?

Quick Links

Customer Care

Help

JEGS Online

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