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Jackson Auto Machine Racing Engines

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DSM & EVO I-III CNC Race Ported Cylinder Heads

Jackson Auto Machine's Cylinder heads are designed to suit your 4g63 performance demands. Every cylinder head is custom built to order which ensures it fulfills the customer's power goals. We designed the first CNC Race Ported Cylinder head package for our 1st & 2nd Gen customers. With our extensive track experience we provide our customers with the best possible performance value. We use only Dyno tested, Race Track proven techniques in our builds. You will make more power with with our port design!


4G63 Cylinder Head Refresh Package

$695.00
4G63 Refresh Package 
Product Details...


Stage 1 Cylinder Head Pkg, 4G63

$1,257.05
Stage I Pkg 1G, 2G 4g63 
Product Details...


Stage 1 CNC Race Ported Pkg , +650whp

$2,038.00
CNC Race Ported Pkg 
Product Details...


Stage 2 CNC Race Ported Pkg, +750whp

$2,238.00
CNC Pkg, +750whp 
Product Details...


Stage 3 CNC Race Ported Pkg, +850whp

$2,650.00
Stage 3 CNC,+850whp 
Product Details...


Stage 4 CNC Race Ported Pkg,+1000whp

$4,500.00
CNC Stage 4 Race Pkg, +1000whp 
Product Details...


Stage 1 CNC Race Ported- 2Gen

$2,285.00
Race Ported,2 Gen +650whp 
Product Details...


JAM Spec-Dual Valve Spring Option

$365.00
JAM Spec-Dual Valve Spring Option 
Product Details...



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Core Charges

Certain products that Jackson Auto Machine sells have a CORE CHARGE associated with them. The amount of the core charge will be listed next to the product description and will be separate line item on your on-line order. This amount is refundable upon return of the core.

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Shipping Policy

We ship items within 48 hours. We ship all packages thru FedEx ground. Please call for rush shipment services. We ship all International items thru USPS, FedEx and Bax Global depending up on the size and weight of the shipment. For more information please call us at (410) 859-3269.

Return Policy

Only brand new, unopened, factory sealed boxed items can be returned within 7 business days, the container must still be sealed, clean and sellable-no dirt or grease on boxes will be accepted.

No open bearing boxes will be accepted. No returns on gasket sets, special orders or custom orders.

All returns are subject to 25 percent restocking fee.