The SuperPro SPF3946K rear subframe bush kit replaces soft factory rubber, which is designed for ride comfort and noise isolation but over time softens, cracks and allows excess movement that dulls handling and can affect alignment. The low-compliance polyurethane controls flex, twist and deflection for sharper steering response, more consistent geometry under load and a more connected, predictable feel without the harshness of solid mounts.
Application
BMW
1
2003-2013 E81, E82, E87, E88
BMW
1
2011-2019 F20, F21
BMW
2
2012-2021 F22, F23, F87
BMW
3
2004-2013 E90, E91, E92, E93 (Excl. M3)
BMW
3
2011-2019 F30, F31, F34, F80 (Excl. M3)
BMW
4
2013-2020 F32, F33, F36, F82, F83 (Excl. M4)
BMW
X1
2009-2015 E84 sDrive
BMW
X1
2009-2015 E84 xDrive
BMW
X3
2003-2011 E83
SuperPro Bushings are the perfect suspension upgrade or replacement solution!
Lifetime Warranty
Enhances vehicle handling and performance
Unaffected by extreme temperatures, oils, water or coolant
A superior alternative to rubber: providing higher quality, quieter, longer lasting bushings
Made with SuperPro's proprietary engineering-grade polyurethane formula
Designed in Australia
SuperPro SPF3946K
Specifications
Kit
Kit type
Rear Subframe Bush Kit
Kits required
1
Includes
4 Diff Mount Bushings
Fitting
Fitting position
Rear
Install time
5 hours
Wheel alignment required
Yes
Identifiers
SKU
SPF3946K
EAN
9317745039464
SuperPro SPF3946K
Bush dimensions
All sizes in millimetres. The letters on each drawing match the letters on the measurements beside it.
Type 18 in kit
Size 1× 2in kit
AOuter diameterOD80 mm
BInner diameterIDBI40mmBII32mm
CLength43.5 mm
DFlange thicknessFL14 mm
EFlange outer diameterFLOD96 mm
Centre tubeOD × ID × length, mm32 × 17.4 × 71.536 × 24.5 × 70× 2 / 2
Size 2× 2in kit
AOuter diameterOD75 mm
BInner diameterIDBI44.3mmBII35.5mm
CLength42 mm
DFlange thicknessFL11 mm
EFlange outer diameterFLOD85 mm
Centre tubeOD × ID × length, mm32 × 17.4 × 71.536 × 24.5 × 70× 2 / 2
Size 3× 2in kit
AOuter diameterOD80 mm
BInner diameterID32 mm
CLength37.5 mm
DFlange thicknessFL8 mm
EFlange outer diameterFLOD96 mm
Centre tubeOD × ID × length, mm32 × 17.4 × 71.536 × 24.5 × 70× 2 / 2
Size 4× 2in kit
AOuter diameterOD75 mm
BInner diameterID35.5 mm
CLength45.5 mm
DFlange thicknessFL14.5 mm
EFlange outer diameterFLOD85 mm
Centre tubeOD × ID × length, mm32 × 17.4 × 71.536 × 24.5 × 70× 2 / 2
SuperPro warranty
Lifetime warrantyBall joints, tie rod ends, Duroballs and links: 3 year / 60,000km
This SuperPro part is covered by a lifetime warranty against manufacturing defects, for on-road, off-road, track and competition use. The warranty covers replacement of the original component only. Ball joints, tie rod ends, Duroballs and links are covered for 3 year / 60,000km.
This product:SPF3946K is protected by a lifetime warranty
Our warranty is in addition to your rights under the Australian Consumer Law.
Proof of purchase
Proof of purchase is required, such as your order number. Keep the part and any related components until your claim is finalised.
Common exclusions
Finish, corrosion and normal wear
Damage from installation, installation error or not aligning the wheels after fitting
Labour and consequential costs
Not fitted to the catalogue-listed application
Not purchased from Northman
How to make a claim
1
Fill in the Warranty Request form with your order number, the product, your vehicle details, how the vehicle is used and a description of the problem.
2
We'll reply within 3–5 business days and ask for clear photos or videos of the part, the problem area and how it's fitted.