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

The ISR Performance Dual Drilled Front Hub is a single front hub for converting a BMW E36 or E46 (and select Z3/Z4 models) between the OEM 5x120 bolt pattern and a 5x114.3 bolt pattern. Both bolt patterns are drilled and threaded in the same hub. Hubs are sold individually, so you'll need two for a complete front axle.

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.

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.

Sold Individually

This SKU is one front hub. Order two for a complete front axle, or buy the complete 4-hub kit (front and rear) under IS-E346DDHUBKIT for a better per-hub price.

Critical Note: Rotor Drilling Required

To properly use the 5x114.3 pattern, you must drill your OEM rotor with the additional 5x114.3 bolt pattern. The hub comes dual-drilled, but the rotor doesn't.

Construction

• OEM 5x120 BMW bolt pattern
• Additional 5x114.3 Japanese bolt pattern
• Both patterns tapped at M12 x 1.5 (OEM thread)
• Factory brake rotor set screw hole retained
• Modeled after OEM part number 31226757024

Fitment

Verify your specific VIN against OEM part number 31226757024 before ordering. Front hub fits a wide range of BMW E36, E46, Z3, and Z4 models.

• 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

What's in the Box

• 1x Dual drilled front hub

Product Details

Brand: ISR Performance

Part Number: IS-E346-DDFH

Type: Dual Drilled Front Hub (Single)

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)

OEM Reference: 31226757024

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

Quantity for Complete Front Axle: 2 hubs required

Complete 4-Hub Kit: IS-E346DDHUBKIT (2 front + 2 rear, better per-hub price)

Sold: Individually (1 hub)

Legality: Off-road and competition use only