H&R 29258-1 Street Performance Coilover Kit

The H&R 29258-1 Street Performance Coilover Kit delivers a finely balanced suspension upgrade engineered for daily drivers and serious enthusiasts alike. Designed and manufactured in Germany, these coilovers combine race-derived technology with real-world street comfort, offering a meaningful improvement over factory suspension without sacrificing ride quality.

At the core of this system is a mono-tube gas shock construction — a significant step up from conventional twin-tube dampers. Mono-tube shocks run cooler, respond more precisely, and are lighter than their twin-tube counterparts, helping reduce unsprung weight for sharper handling feel. H&R's true threaded shock body (not a sleeve-over imitation) allows precise ride height adjustment while also promoting better heat dissipation during spirited driving.

Each shock is custom-valved to work in harmony with a vehicle-specific progressive-rate spring, creating a cohesive, purpose-built suspension system rather than a mix of off-the-shelf components. The progressive spring rate means the suspension stays compliant over everyday bumps and road imperfections, then firms up progressively under hard cornering or aggressive driving inputs. The result is reduced body roll, improved weight balance, and a lower center of gravity — all without the harshness typically associated with performance coilovers.

Key Features:

• Mono-tube gas shock absorbers for precise damping and reduced unsprung weight
• True fully-threaded shock body for accurate, adjustable ride height — not a sleeve-over design
• Front lowering range: approximately 1.3" – 2.2"
• Rear lowering range: approximately 1.0" – 2.0"
• Vehicle-specific progressive-rate springs matched to shock valving
• Lowers center of gravity to reduce body roll during cornering
• Engineered and manufactured in Germany
• Suitable for daily drivers through serious performance tuners

H&R has been producing premium suspension components since the late 1970s and is widely recognized as the originator of the true street coilover system. The 29258-1 continues that legacy, offering a complete, cohesive kit that improves handling dynamics and stance without compromising the comfort required for everyday use.