Buildjournal Front Race Splitter – E46 M3


Increase downforce with our E46 M3 Front Race Splitter. Our CAD-traced splitters are machine cut using aluminum composite material. This will fit E46 M3 as well as E46 non-M with M front bumper. 100% compatible with our Quick-Release Adjustable Front Splitter Brackets and Splitter Brace.

Type 1 is a rounded corner design.
Type 2 is a straight-side design with 11″ side cuts, made compatible for winglets such as the RS Future Winglets.

Alumalite – aluminum composite with a high-density corrugated polypropylene core – 5.8 lbs.


Add-On Features

SKU 16549 Categories , Tag

Splitter+Lip Options

Splitter sizes can be generally adjusted +/- 1"

Bimmerworld Riser6.5"3.5"
ACS Poly4.5"1.5"
ACS FRP/CF5"1.5"


Aluminum composite panel with a high-density corrugated polypropylene core

Impact Resistance


Aluminum composite panel with a solid polyethylene core

Impact Resistance
E46 M3 Front Splitter

Sturdy, Light Construction

Lightweight aluminum composite material that is highly water resistant. The unique core design makes it light, but very rigid.

Weighs Less Than 6 lbs (Alumalite)

The Alumalite material core is made with a corrugated plastic with 2 thin aluminum sheet sandwiching the core. If you're trying to reduce weight, this is a better option than wood, ABS plastic or Alupoly.

E46 M3 Front Splitter
E46 M3 Front Splitter

Splitter Guard (Add-On)

For those that want an extra layer of protection from road debris, our plastic splitter guard is a great add-on. It also improves the aesthetics of the lip.

Splitter Brace (Optional)

It is highly recommended to reinforce the front splitter with a Splitter Brace. This provides maximum frontal support of the splitter over hang without having to use splitter rods.

E46 M3 Quick-Release Splitter Brackets - Buildjournal

Splitter Brackets (Optional)

100% compatible with our splitter brackets.

Learn More

Splitter Extension

Extend the rear of the splitter by an additional 9" and accelerate low pressure air underneath the chassis. This is a separate panel that bolt's on to the E46 M3 Quick-Release Splitter Bracket Full Kit with Rear Support.

E46 M3 Race Splitter

❗ Additional reinforcements for the Race Splitter, such as front splitter rods, are recommended to ensure stability during high-speeds. It is also critical to set the angle-of-attack (AOA) of the Race Splitter to eliminate excessive downwards angle at high-speeds. We recommend slightly positive (facing upwards) AOA from neutral 0 degrees.

Vehicle Fitment

BMWE46323CiM52 2.5L
BMWE46323iM52 2.5L
BMWE46325CiM54 2.5L
BMWE46325iM54 2.5L
BMWE46325xiM54 2.5L
BMWE46328CiM52 2.8L
BMWE46328iM52 2.8L
BMWE46330CiM54 3.0L
BMWE46330iM54 3.0L
BMWE46330xiM54 3.0L
BMWE46M3S54 3.2L
Weight9 lbs
Dimensions69 × 0.25 × 23.25 in



Alumalite, Alupoly







Product Category

Body & Aero


Type 1, Type 2

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