Forged BMW N20 Bottom End Parts Kit (800 HP) Level 3 - Navardi Tuned

Forged BMW N20 Bottom End Parts Kit (800 HP) Level 3

Regular price $6,500.00 AUD
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Only 30 items in stock!

The Forged BMW N20 Bottom End Parts Kit (800 HP) Level 3 is the bare minimum required to get 800 Horsepower out of your N20.

This kit when combined with the right turbo will allow you to make up to 800HP! all that is required is machine work and assembly. These kits come with all parts required, unfortunately a lot of the bolts installed in the N20 Motor cannot be reused once disassembled and as such must be replaced with OEM or aftermarket.

This kit takes all the guess work out and includes everything you need to upgrade your bottom end.


This kit doesn’t include Cylinder Sleeves, However unless you can respray the factory Plasma Arc coating to the bores, you will need to sleeve the block.

Kit Includes:
- CP Carrillo 10.0:1 Pistons with Chrome moly Piston Pins 84mm Bore

- 4 x CP Carrillo H Beam Connecting Rods with CARR Rod Bolts

- Athena Cut - Ring Head Gasket

- 10 x M10 ARP Main Stud kit (require modification for Oil Pump clearance refer to my build guide)

- 16 x M8 x 30mm OEM Bed Plate Securing Bolts (OE 07129903926)

- 4 x M8 x 40mm OEM Crank/Flywheel Hub Bolts (OE 07119907475)

- 1 x Crankshaft HUB Seal (OE 11118618864)

- 1 x Crankshaft Flywheel HUB Seal (OE 11117587168)

- 2 x Spark plug / Injector Bucket Gaskets (OE 11127589830)

- 1 x ARP Head Stud Kit (Requires the 4x Corner Head Bolt Holes to be Timeserted to accept 11mm Stud, Time Sert Specs are M11 x 30mm x 1.5)

- 1 x Valve Cover Gasket Set OEM (OE 11127588418)

- 1 x M10 x 30mm Oil Pump Drive Gear Bolt OEM (OE 11277619309)

- 1 x Oil Filter Housing to Cylinder Head OEM Gasket (OE 11428637821)

Parts Recommended but not included:

  • Cylinder Sleeves are necessary in a rebuilt N20 pushing high HP.
    Darton MID WET Sleeves are recommended over Flanged and "Parallel" Liners. Contact Us if you would like to purchase Darton WET Sleeves, Alternatively have your engine builder organise a sleeve solution due to the measurements required no off the shelf solution currently exists.
  • Due to varying sizes of Rod Bearings and Main Bearings it is vital you have your engine builder measure these before ordering the correct size (some main bearings and rod bearings come in 3 different sizes!). We also recommend your engine shop source these bearings But an aftermarket Rod Bearing we HIGHLY recommend is the ACL TRI-METAL Racing Rod Bearings (4B1584H or 4B1584HX).
  • We also recommend having the engine block semi or fully closed decked to help prevent cylinder wobble under high boost!

Parts we have excluded due to different Variants of the N20 is the Oil Sump Gasket since N20 RWD and N20 AWD motors have different sumps there is different gaskets for each sump, we recommend you replace this during the rebuild.
We also exclude the Crankshaft HUB Capture Bolt this bolt is required to be replaced if your Engine Builder removes the HUB from the Crankshaft, Should you need it however please refer to OEM Part Number 11217614270 (Comes standard in our Timing Chain Repair Kit).
It is also important to note that you will need to replace the flywheel bolts (AT or MT each transmission has different bolts for their flywheels and torque converter) as they must be replaced once removed.

If you have a specific enquiry please email us:

Warranty Information
N20 Rebuild Guide

Upon purchase of a tuning related product you are agreeing to this disclaimer. You will be emailed a copy of the below document, customers are required to read the disclaimer and respond with I agree before any tuning takes place. Should you not agree with this disclaimer then a refund is processed within 48 hours.

Should you not agree with the below then a refund will be issued immediately and tune requests revoked.

By requesting a Custom Tune from “Navardi Tuned”, you, as the “Customer”, hereby represent that you understand the inherent risks of modifying the engine calibration through the use of software manipulation “ECU Tuning” and that you have full authority to authorize the tuning of this vehicle. You understand that some or all of these parts and/or tuning may not comply with Federal, State, Province, and/or Local laws, ordinances, and regulations. You (The “Customer”) take full responsibility to ensure that any modifications or upgrades that you have done to your vehicle conform to all applicable laws and regulations for road use, especially pertaining to safety and emissions.
You acknowledge that Navardi Tuned has made you aware that certain parts are intended for Racing Competition Only and not meant to be used on a road car. You absolve Navardi Tuned for any and all burden of responsibility in ensuring your car satisfies regulations set forth by Federal, State, and/or Local governing agencies.
You also absolve Navardi Tuned for any damages to your motor due altering the stock calibration of the motor( “ECU Tuning”), you understand that there are inherit risks with increasing the output of your motor above factory stock limits. We try our very best to ensure reliability and engine safety, but engine damage can occur due to a variety of reasons, for which we “Navardi Tuned” are not liable for.  
As the “Customer” you must understand that Navardi Tuned will not be held accountable for any illegal action committed whilst tuning this vehicle, Data-Logging should be done in a safe and legal environment such as a “Drag Strip” or “Race Track” or “Dynamometer”.
As the “Customer” you hereby represent that you know the condition of the vehicle and you assure that it is in acceptable condition to be tuned and data-logged for the purpose of tuning.
You the "Customer" must also understand that the purchase of this custom tune requires the purchase of the Bootmod3 tuning licence, which can be purchased from
You the "Customer" must also understand that all communication will be made via the comment feature in the custom tune request for all communication and/or support related requests.
Our Terms and Conditions can also be found on our website:
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Please note: Any modification recommendations provided by Navardi Tuned are general in nature and Navardi Tuned cannot be held liable for any engine damage and or vehicle damage caused by any parts that have been recommended. At the end of the day not all parts are made and installed the same way, as a result poor quality products can exist and unfortunately create potential damage to a clients engine.
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