ISR Performance Dual Drilled Conversion Front and Rear Hubs - E36 / 46 - 5x114.3 + 5x120

The ISR Performance Dual Drilled Hub Kit is the complete 4-hub set (2 front, 2 rear) for converting a BMW E36 or E46 between the OEM 5x120 bolt pattern and a 5x114.3 bolt pattern. Both bolt patterns are drilled and threaded in the same hub, so you can switch between wheel sets without changing hardware. Ideal for drift builds running Japanese-spec wheels (5x114.3) while keeping the option to run BMW-spec wheels (5x120) or vice versa.

What It Does

The 5x120 BMW bolt pattern is uncommon in the drift wheel market, which is dominated by 5x114.3 Japanese-spec wheels. Adapters work but add unsprung weight, change offset, and introduce another failure point. Dual-drilled hubs solve that problem at the source: the hub itself has both bolt patterns drilled and threaded, so any wheel in either pattern bolts directly to the hub.

The set includes 2 front hubs and 2 rear hubs, covering all four corners of the car in one purchase. Both patterns are tapped with the OEM lug bolt thread pitch (M12 x 1.5), so factory or aftermarket lug bolts in either pattern work directly.

Construction

• OEM 5x120 BMW bolt pattern (factory wheels)
• Additional 5x114.3 Japanese bolt pattern
• Both patterns tapped at M12 x 1.5 (OEM thread)
• Factory brake rotor set screw hole retained
• Front hub modeled after OEM 31226757024
• Rear hub modeled after OEM 33411093567

Critical Note: Rotor Drilling Required

To properly use the 5x114.3 pattern, you must drill your OEM rotors with the additional 5x114.3 bolt pattern. The hubs come dual-drilled, but the rotors don't - you'll need to add the extra pattern to your rotors yourself, or run a rotor that's already drilled for 5x114.3 (some aftermarket options exist).

Fitment

Verify your specific VIN against the OEM part numbers before ordering. The front hub (OEM 31226757024) fits a wide range of BMW E36, E46, Z3, and Z4 models. The rear hub (OEM 33411093567) fits a wide range of E36 and E46 models.

NOT for E46 330 or M3 rear axles - those use larger rear hubs not covered by this kit.

Front Hub Compatibility:

• E36: 318i, 318is, 318ti, 320i, 323i, 325i, 325is, 328i, M3
• E46: 320i, 323ci, 323i, 325ci, 325i, 328ci, 328i, 330ci, 330i
• Z3: 1.9, 2.5, 2.8, 3.0, Z3M
• Z4: 2.5i, 3.0i, 3.0si

Rear Hub Compatibility:

• E36: 318i, 318is, 320i, 323i, 325i, 328i
• E46: 323i, 325ci, 325i, 328i
• NOT compatible: E46 330, E46 M3 (larger rear axles)

What's in the Box

• 2x Dual drilled front hubs
• 2x Dual drilled rear hubs

Individual Hub SKUs

If you only need a front or rear pair, the hubs are also sold individually:

• Front hub: IS-E346-DDFH (sold individually)
• Rear hub: IS-E346-DDRH (sold individually)

Product Details

Brand: ISR Performance

Part Number: IS-E346DDHUBKIT

Type: Dual Drilled Hub Kit (4 hubs - 2 front + 2 rear)

Vehicle Fitment: BMW E36, E46, Z3, Z4 (specific models - see compatibility list)

Bolt Patterns: 5x120 (OEM BMW) and 5x114.3 (Japanese)

Thread Pitch: M12 x 1.5 (both patterns)

Front Hub OEM Reference: 31226757024

Rear Hub OEM Reference: 33411093567

Critical Modification Required: OEM rotors must be drilled with additional 5x114.3 pattern

NOT Compatible (Rear): E46 330, E46 M3 (larger rear axles)

Individual SKUs: IS-E346-DDFH (front), IS-E346-DDRH (rear)

Sold: Complete 4-hub kit (2 front + 2 rear)

Legality: Off-road and competition use only