JAK'S Performance Cylinder Heads
Four build levels for different operating goals. Specifications vary by engine and product; review the linked listing or request a written fitment quote before ordering.
Stage 3 · CAT C15 ACERT · Example configuration
Cast Right, From The First Pour
Performance-head construction and included components vary by SKU. The linked product record or written quote identifies the casting, component package and order terms for your application.
Materials
Confirm the material and casting specification for the selected SKU. Product-specific documentation is available on request.
Core Making
Casting and passage geometry must match the engine application. Send the ESN, CPL, VIN, casting or tag number so the selected product can be checked.
Heat Treat & Test
Manufacturing and test processes vary by product and supplier. Ask for the documentation that applies to the exact product on your quote.
Machined, Cleaned, Assembled & Shipped
Machining, assembly state, included components, packaging and freight method vary by product. Review those details before authorizing the order.
Precision CNC Machining
Review the current product listing or written quote for machining and surface-finish details.
Thorough Cleaning
Ask what preparation and cleaning steps apply to the exact product being quoted.
Precision Assembly
Confirm which components are included and whether the selected head ships bare, assembled or loaded.
Secure Packaging
Confirm commercial-address, liftgate, appointment and crate or freight requirements before shipment.
Four Build Levels, Verified Per Application
Use these levels as a starting point. The linked product listing or written quote controls specifications, current price, availability, core terms, freight and warranty.
Stage 1
Stage 2
Stage 3
Stage Comparison
A starting-point comparison, not a fitment or performance guarantee. Open the linked listing or request a written quote for the exact SKU.
| Build-level guide | Stage 1 Daily Driver $3,055.00 Review |
Stage 2 Upgraded Quote Review |
Stage 3 Performance $4,108.00 Review |
Stage 6 Specialized Quote Review |
|---|---|---|---|---|
| Starting point | Stock-duty use | Higher-duty use | Performance use | Specialized builds |
| Catalog source | Linked product | Written quote | Linked product | Written quote |
| Fitment inputs | ESN / CPL / VIN / tag | ESN / CPL / VIN / tag | ESN / CPL / VIN / tag | ESN / CPL / VIN / tag |
| Components & materials | Product-specific | Product-specific | Product-specific | Product-specific |
| Core & freight | Confirm before order | Confirm before order | Confirm before order | Confirm before order |
| Warranty | Written SKU terms | Written SKU terms | Written SKU terms | Written SKU terms |
Verify The Build Before You Buy
Stage names do not guarantee a material grade, horsepower limit or component package across every engine. We confirm the exact product against how the engine is built and used.
Send These Details
Details CheckedFor Your Application
The product page and written quote identify what applies to the exact SKU. Send the engine identifiers and operating details needed to review fitment.
Fitment
Identifiers
Review ESN, CPL, VIN, casting and tag numbers against the selected product.
Product
Details
Confirm casting, components, assembly state, included items and application limits in writing.
Order
Terms
Confirm current price, availability, core, freight, delivery and written warranty terms.
Review
Confirmed
Checked
Documented
Terms
Welcome
Product-Specific Written Warranty Terms
Coverage length, mileage, parts, labor, freight, exclusions and claim steps can vary by product and application. Review the written terms for the exact SKU before authorizing the order.
How To Start A Claim Review
Not Sure Which Stage You Need?
Tell a JAK'S specialist how the engine is built and used. We will review catalog options and document the selected SKU, current price, fitment inputs and order terms.