What is the benefit of a monotube damper design?

Monotube dampers use a larger piston, which gives better control over rebound damping. They also prevent aeration and foaming, resulting in more responsive valving compared to twin-tube designs.

How do I adjust the ride height and damping on these coilovers?

Ride height is adjusted by threading the spring perch up or down on the shock body. Rebound damping can be adjusted using the knob on top of the damper, with 12 distinct positions to choose from.

Are these coilovers suitable for track use and daily driving?

Yes, these coilovers are designed for a combination of track performance and balanced road use. You can fine-tune the rebound and ride height to suit your specific needs, whether on the track or for daily driving.

Specifications

Brand: AST
Part #: ACC-B1604SD
UPC: ACC-B1604SD

AST 04-13 BMW 116d E81 RWD 5100 Comp Coilovers w/ Springs Top Mounts & Droplink

Name: AST 04-13 BMW 116d E81 RWD 5100 Comp Coilovers w/ Springs Top Mounts & Droplink
Brand: AST
SKU: ast-ast-04-13-bmw-116d-e81-rwd-5100-comp-coilovers-w-springs-top-mounts-droplink-t14-679711
Price: 5646.72 USD
Availability: BackOrder

$5646.72

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AST 5100 Competition Coilovers for BMW 128i, 135i, 328i, 335i (2006-2013). Optimize grip with adjustable rebound and ride height.

Key Features

Monotube dampers — offer a large piston for better rebound damping control.
Adjustable rebound — control the return extension of your dampers for ideal road balance.
12 rebound positions — each setting offers distinct feedback and a unique driving experience.
Front and rear coilovers — prioritize adjustability and performance.
Camber-adjustable front top mounts — allow for geometry changes to improve front-end grip.
Solid rear top mounts — provide a solid connection for the rear suspension.

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About this part

Product Details

Worn-out suspension causes poor handling and an uncomfortable ride. The AST 5100 Competition Coilovers are a direct fix for BMW models from 2006-2013. These are built for drivers who want track-level performance but also need a balanced setup for daily driving. You can fine-tune your car's grip by adjusting rebound damping and ride height.

These coilovers use a monotube design, which means they have a larger piston for better control over rebound damping. This design also prevents aeration and foaming, leading to more responsive valving. The dampers are rebuildable at a certified AST service center, so you can address any issues down the road. The initial spring rates are based on AST's extensive development and testing.