H&R 29212-1 Street Performance Coilover Kit - Mono-Tube Adjustable Lowering System

The H&R 29212-1 Street Performance Coilover Kit delivers a finely balanced suspension upgrade engineered for daily drivers and enthusiasts alike. Unlike conventional twin-tube designs, these coilovers are built around a mono-tube gas shock construction that delivers more precise damping response, reduced unsprung weight, and stable performance across a wide range of driving conditions.

At the heart of the system is H&R's pairing of vehicle-specific shock valving with progressive-rate coil springs, purpose-engineered together from the ground up. This integrated approach produces a suspension system that remains compliant over everyday road imperfections while delivering the firmness and control demanded during spirited driving. The result is a coilover kit that works equally well for the daily commuter and the weekend canyon carver.

Height adjustment is made possible by a fully threaded shock body — a true threaded damper, not simply a threaded housing around a damper insert. This design offers superior heat dissipation and allows precise, repeatable ride height tuning using the easy-to-adjust spring perch seats.

Key Features:

• Mono-tube gas shock absorbers for precise handling response and stable damping in all conditions
• Progressive-rate springs individually matched and tuned to each application's specific shock valving
• Fully threaded shock body (not a sleeve/insert design) for better heat management and ride height accuracy
• Adjustable lowering range of approximately 1.0" to 2.5" (front and rear ranges vary by application)
• Easy-to-adjust spring perch seats for dialing in preferred ride height
• Lighter than equivalent twin-tube designs, reducing unsprung weight for improved handling response
• Suitable for daily driving and performance street use
• 2-year warranty to the original purchaser

Professional installation and a post-install wheel alignment are recommended. Lowering range may vary on vehicles equipped with factory sport suspensions or different engine configurations. Always refer to the included H&R tech sheet for allowable adjustment range, as operating outside this range may void the warranty.