Setting
Currency
0 Item(s)

You have no items in your shopping cart.

Zipper’s Stage I WorkHorse Heads for Twin Cam® & Evolution® Engines Double click on above image to view full picture

Zipper’s Stage I WorkHorse Heads for Twin Cam® & Evolution® Engines

Be the first to review this product

As low as: $649.00

Price as configured: $0.00

Overview

Add Torque and Power to any production Twin Cam® or Evolution® head with our WorkHorse blueprinting service. After cleaning and Step-Lock guide installation and fitment, proprietary seat and valve machining improves flow and ensures a positive seal by truing now heat-seasoned seats and removing typical production chatter that leads to leaks between the seat and valve. This process improves even new, low mileage heads on engines that are being upgraded with cams or big bore kits. Valves are upgraded to Baisley 1.840” intakes and 1.615” exhausts with Viton seals, while new valve springs are set up for cam selection provided. Head gasket surfaces are skimmed to ensure absolute flatness. This Stage I head delivers a true, high quality “budget upgrade” for any engine.

In compliance with ARB emissions laws, this product is not sold or shipped to California.

Price as configured: $0.00

Details

Add Torque and Power to any production Twin Cam® or Evolution® head with our WorkHorse blueprinting service. After cleaning and Step-Lock guide installation and fitment, proprietary seat and valve machining improves flow and ensures a positive seal by truing now heat-seasoned seats and removing typical production chatter that leads to leaks between the seat and valve. This process improves even new, low mileage heads on engines that are being upgraded with cams or big bore kits. Valves are upgraded to 7mm coated stainless 1.850” intakes and 1.610” exhausts with Viton seals, while new lightweight beehive valve springs with chrome-moly retainers and keys are set up for cam selection provided. Head gasket surfaces are skimmed to ensure absolute flatness. This Stage I head delivers a true, high quality “budget upgrade” for any engine, while updating 1984-2004 cylinder heads to modern, lightweight 7mm components.

Stage I WorkHorse headwork is performed on supplied head cores; in-house shop time is 3-7 working days.

Exchange heads may be available if the condition of your cores qualifies. You can also purchase heads outright (without supplying a core set). We will supply clean, reconditioned factory castings for your application - add part #517-015 to your order.

International Customers – Import duties are not required when to shipping your castings for modification. Special low shipping rates are available for your cores; contact your sales representative for details.

Remove heads from engine, wash off oil and ship to Zipper’s as-is. Improper cleaning methods can actually do more harm than good; we suggest you allow us to properly prepare your heads for modification. Extreme care is taken during our preparation process to preserve component finishes. A small cleaning charge applies to heads sent in for modification.

 

DOCUMENTS & DOWNLOADS

Zipper's Job Order Sheet

 

 

This product is not for sale or use on pollution controlled vehicles.

Product Tags

Use spaces to separate tags. Use single quotes (') for phrases.

Write Your Own Review

You're reviewing: Zipper’s Stage I WorkHorse Heads for Twin Cam® & Evolution® Engines

How do you rate this product? *

  1 star 2 stars 3 stars 4 stars 5 stars
Price
Value
Quality

Additional Information

Brand Zipper's
Engine Type Big Twin®, Evolution®, Twin Cam®
Model No
Year Range No
Transmission Type No
Loading...
Loading...