MSW’s Take: These reinforcements are super critical upgrades to your E46. Around 90% of the E46s we work on already have cracks forming in their chassis where the subframe is attached, and that’s just from street driving. This updated design offers even more strength than previous designs.
The E46 Rear Subframe/Chassis Reinforcement Kit solves a problem that plagues the E46 3-series just as it did with the earlier E36 3-Series models. This kit was developed to address some of the shortcomings of previous designs. Namely increased welded area.
There are lots of very intricate and over-engineered subframe/chassis reinforcements on the market today. We’ve found, through hundreds and hundreds of race hours, that these “fancy” kits simply aren’t necessary. A high quality, thick piece of steel with adequate welds is more than enough to make your E46 survive track abuse.
This kit applies to all BMW E46 cars, including the M3.
The E46 Rear Subframe/Chassis Reinforcement Kit consists of 4 main subframe mounting point reinforcements, and spacers to realign the cross member.
- Welding is required*
- Fits all E46 models, including M3
- Protects subframe and chassis from costly damage
- Factory-like fitment
- Must-have for any and all E46s driven hard on the street or track
* Do not attempt to epoxy reinforcements in place. It does not work, regardless of what YouTube or Facebook tell you. We’ve seen the results first hand. All reinforcements must be welded in place.