Fabulous looks and second-to-none performance-what’s not to like!

BIG BILLET TWIN CAM® HEADS - Designed for use on engines with 4” – 4-1/8” bore. Stainless steel 2.00” intake and 1.625” exhaust valves glide in our ductile cast iron StepLock guides. Teflon seals, compression releases and a pro-quality valve spring kit with titanium collars, set up to handle .700” lift cams are installed. 94cc chamber. Available in single or dual carb applications; single carb style accepts 1.780” round port intake manifold. Dual carb heads require EV-style rocker boxes.

MAGNUM BILLET TWIN CAM HEADS - Highest output production head you can buy, designed for race-winning performance. Oversize oval intake ports for massive airflow through 2.100” stainless valves; exhaust gases exit through 1.715” valves and raised, high flow ports. NASCAR-developed valve springs and compression releases are installed. Special intake manifold required and EV-style rocker boxes required; exhaust pipes must be fabricated. 83cc chamber undecked. For 4–1/8” and larger bore. Serious heads for serious Power!

The products on this page are legal for sale in the State of California only for racing vehicles which may never be used upon a highway.

Zipper Product Information

# 517-607 - Zipper's CNC Big Billet Dual Carb TC heads, set
# 517-607P - Zipper's CNC Big Billet Dual Carb TC heads, polished, set
# 517-611 - Zipper's CNC Magnum TC heads, set
# 517-611P - Zipper's CNC Magnum TC heads, polished, set
For more information, contact:

ZIPPER’S PERFORMANCE PRODUCTS
6655-A Amberton Drive
Elkridge, MD 21075
Phone 410.579.2828
Fax 410.579.2835
www.zippersperformance.com