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Procomp Motorsport's 3021 BIG BLOCK CHEVY, ASSEMBLED, Aluminum Cylinder Heads, 396, 402, 427, 454, 502 Chevy Big Block Engines

Auction is for ONE PAIR of HEADS!!!

MFG. SPECS:
Aircraft Grade 356A T-6 Aluminum Alloy, CNC Machined,
115cc Combustion Chamber, Open Chambers , High Flow 320cc Intake Runners,
Fits All OEM Bolt Pattern Manifolds, Intake Bolt Standard OEM Length

8 Bolt Exhaust Flange, Square Port Exhaust, 15/24 Degree Valve Angle

Manganese Bronze Valve Guides, 3 Angle Cut Stellite Valve Seats

Uses Full Size Plug AGF-22, Takes Felpro 1275 bigger gasket set, Felpro 1047 Head Gasket Set

65 ft.lb Torque Specs, .400" thick deck can be milled down to 54cc. ,

Can be Used with Nitrous, Ultra High Compression, & Turbo/Superchargers,

Suggested Roller Cam Base of 1.130", Machined for 7/16" Rocker Studs

ASSEMBLED FEATURES INCLUDE;

4324 S/S Intake Valves- 2.250 + 0.250, OAL 5.494" (11/32" stem)

4317 S?S Exhaust Valves- 1.88 + 0.100", OAL 5.522" (11/32" stem)

7deg. Valve Locks +.145

4140 Steel Retainers 1.400 x 1.060 x 0.690

8005 Single Spring w/dampner, springs are designed for big block motors that require a 1.5250 outer diameter spring. Springs are desigend for street/strip applications with cam combination with no more than .690-.750 lift. Spring pressures and installed heights are as follows.

140lbs at 1.900
165lbs at 1.850
180lbs at 1.800
350lbs at 1.300
365lbs at 1.250
380lbs at 1.200

Coil bind at 1.160

Installed spring height should be checked with your camshaft specs of your application.

Uses Felpro # 1275 Rectangular Port Intake Gasket

Long 7/16" Rocker Stud Kits Available @$49.95

PC-23031 Satin, BBChevy Intake w/Raised Runners-Single Plane $229.95

Guide Plate Kit $49.95, Head Stud Kit $79.95

Flow Test Data @28" CFM Water Intake (according to manufacturer)

LIFT 100 200 300 400 500 600 700
INTAKE 74.3 166.11 245.36 308.05 339.84 360.43 374.31
EXHAUST 62.0 118.0 160.0 195.0 229.0 248.0 265.0

Seller Phone Number: 850-575-9900

Seller Phone Number2: 850-575-9900

This item is NEW

Trades NOT ACCEPTED

Payment options:

NO PERSONAL CHECKS!

Item Location: TALLAHASSEE, FL Get Directions To This City

Instructions for buyer:  Buyer will pay all shipping/handling charges to their final delivery destination.

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