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.
This is our baseline for anyone pushing a B58 past what the factory internals were ever built to survive. Stage 1 covers the rotating assembly, head hardware, and sealing, everything that has to hold when boost and timing start climbing. It is built to safely support tuning up to 1,000 WHP, not a promise that your engine makes 1,000 WHP out of the box. That number is a ceiling, and we build with margin above it on purpose.
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 1,000 WHP.
Every build follows our researched and validated Stage 1 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.