ISR Performance Pro Series Coilovers - BMW E46

The ISR Performance Pro Series Coilovers are 32-way adjustable damping coilovers for the BMW E46. 8k front spring rate, 10k rear spring rate, front pillowball upper mounts, and Japanese-sourced bearings. Designed as a street-and-track coilover that delivers performance dampening control without sacrificing daily-driver comfort.

What It Does

Adjustable coilovers let you tune ride height and damping to the way you actually drive. 32 clicks of damping adjustment cover the range from a comfortable street setting to a stiff track setting, which means one set of coilovers can handle daily commuting and weekend track days without compromise. The 8k front / 10k rear spring rates are tuned for the E46 chassis to give predictable handling on a lowered car without crashing through bumps.

Front pillowball upper mounts give precise steering response and let you dial in camber for more aggressive alignment setups. Japanese-sourced bearings on critical wear points improve longevity over generic budget coilovers.

Critical Note: Non-True-Type Rear

These coilovers utilize an OE-style spring and bucket setup in the rear, not a true-type coilover. The rear consists of separate springs and shocks that bolt to the factory spring perch locations, rather than an integrated coilover unit with the spring on the damper. This is normal for E46 platform coilovers and means installation in the rear is more like a spring-and-shock swap than a coilover swap.

Spring Rates

• Front: 8k (8 kg/mm)
• Rear: 10k (10 kg/mm)

Fitment

• BMW E46 (all variants - 323, 325, 328, 330)

Features

• 32-way adjustable damping
• Front pillowball upper mounts (precise feel, camber adjustability)
• Japanese-sourced bearings on critical wear points
• 8k front / 10k rear spring rates tuned for E46
• Comfortable street ride with track-capable performance

What's in the Box

• 2x Front coilover assembly (full coilover with pillowball mount)
• 2x Rear springs
• 2x Rear shocks
• 1x Spanner wrench set

Product Details

Brand: ISR Performance

Part Number: IS-PRO-E46

Type: Adjustable Coilovers (Pro Series)

Vehicle Fitment: BMW E46 (all variants)

Front Configuration: True-type coilover (spring on damper)

Rear Configuration: Non-true-type (OE spring and bucket style - separate spring and shock)

Damping Adjustment: 32-way

Spring Rate Front: 8k (8 kg/mm)

Spring Rate Rear: 10k (10 kg/mm)

Front Upper Mount: Pillowball

Bearings: Japanese-sourced

Application: Street, spirited driving, and track use

Sold: Complete 4-corner kit with spanner wrenches

Legality: Off-road and competition use only