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This is a sheet metal intake manifold for the 420a. Can be customized for different throttle body setups. This setup is not intended for the stock 420a fuel rail, the Magnus MMCFUL1030 is recommended and can be purchased here as well. 

(MMCFUL1030) takes an 11mm injector cap not the standard 14mm.


Race version:

- Increased plenum size

- velocity stacks standard

- Direct port methanol injection available

- Direct port nitrous available

- Lifetime warranty on welds


Please contact to verify if the product is in stock. If being built please allow 7 to 14 days for fabrication. 

KSR 420a Intake manifold

  • Federal and many state laws prohibit the removal, modification or rendering inoperative any part that affects emissions on motor vehicles used on public roads. Many aftermarket parts and services are intended and designed for track and off-road use only. KSR Performance will not and cannot be held responsible for the customers decision to modify a car that was not designed to make more power than factory specifications.

  • If you have received an incorrect item due to our error we will issue a call tag and pick up the part at no cost to you, upon receiving, we will re-ship the correct item back to you at our expense.  

    Refunds and exchanges are allowed for 30 days after the date of purchase. Returns and refunds may incur a 15% restocking fee after order is placed. Refunds after 15 days are for store credit only. Installed items are not eligible for refunds. No Returns on Special Fabricated Items. (Custom in-house, fabricated items.) No Returns on Electronics and Batteries. (For parts made outside of KSR Performance please contact the manufacture.) Thank you for your purchase.

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