Product Details
About this part
You will receive an email after placing this order to confirm freight and final shipping cost.
Engine core is not included. You will need to supply a healthy core or purchase a core from us.
Stage 3 keeps the factory 3.0L stroke and shifts the focus to the head. We do 5-axis CNC porting in-house along with a full valve job, smoother ports, less turbulence, better seal, more air moving through the head at the same displacement. Rods, pistons, bearings, and cams carry over from Stage 2, and oversized ARP studs with the in-house machining that fits them carry through as well.
It is built to safely support tuning up to 1,300 WHP, not a promise that your engine makes 1,300 WHP out of the box. Send us your engine or buy a core from us and we build the whole thing start to finish. Either way it comes back ready to run once it's through break-in.
Key Specs
Rated to safely support tuning up to 1,300 WHP.
Every build follows our researched and validated Stage 3 spec. Individual engines are not dyno tested.
Break-in period required. Instructions included with every build.
Send in your own engine or purchase a core from KLM for a complete build.
Turnaround is typically 3 to 4 weeks, occasionally longer depending on parts availability and build queue.
Fitment
Not sure it fits? Contact us with your car's year, model and VIN and we'll help you confirm before you order.
If a part doesn't fit as expected, contact us and we'll work with you to resolve it.
Majority of products have a fitment section in the product description or within the title.
Returns
- Unused, uninstalled parts can be returned or exchanged within 30 days of the order date.
- To start a return: Contact us first, don't use Return to Sender.
- Returns can have up to a 20% restocking fee.
- Built-to-order and special-order items can't be returned or cancelled once production begins.
Shipping
- Orders are processed 7 days a week to ensure your product ships as quickly as possible.
- Inspect parts within 10 days of delivery, and reach out regarding any damage or missing pieces.
See our Tariff Policy
Warranty
- All parts retain the manufacturer's warranty.
- Warranty claims are subject to the manufacturer's approval.