AF81130 ’77-’79 425 Premium Re-manufactured Stock Heads
February 21, 2018
AF81320 PRO/Street Iron Heads Large Chamber
February 22, 2018AF81220 Super/Street Steel Heads Large Chamber
$2,190.00
Super/Street Steel Heads
Large Chamber (120cc) heads. Shot-tumbled, magnafluxed, surfaced, and assembled. Intake and exhaust ports are matched to our premium gaskets. Pushrod walls on the intake side are moved back. Ports are smoothed, blended, and polished (the last 1½”). Bronze guide-liners are installed, and three angle seats are cut and hand lapped. Super/Street heads are assembled using oversize 21-4N stainless valves (2.19 / 1.85 valves), special spring shims, performance valve springs (single w/ damper), Chromoly retainers, and hardened valve locks. Valves are not “back cut” to ensure maximum longevity.
CORE CHARGE INCLUDED
Spring 2021 – the ETA for new orders for iron heads is roughly 2 months.
Super/Street Steel Heads
Large chamber (120cc) heads. Shot-tumbled, magnafluxed, surfaced, and assembled. Intake and exhaust ports are matched to our premium gaskets. Pushrod walls on the intake side are moved back. Ports are smoothed, blended, and polished (the last 1½”). Bronze guide-liners are installed, and three angle seats are cut and hand lapped. Super/Street heads are assembled using oversize 21-4N stainless valves (2.19/1.90 for 76cc, 2.11/1.77 for 120cc and 425 heads), special spring shims, performance valve springs (single w/ damper), Chromoly retainers, and hardened valve locks. Valves are not “back cut” to ensure maximum longevity.
CORE CHARGE INCLUDED
Spring 2024 – Stock levels change frequently, the ETA for new orders for iron heads is roughly 1-2 months if not in stock.
| Weight | 65 oz |
|---|---|
| Dimensions | 26 × 8 × 8 in |
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