Instruction Sheets for Part Number TMI-120421400002
TeraFlex Falcon Sport Toyota 4Runner Shock Absorber Systems for 2010-2020 4RUNNER - 12-04-21-400-002
Part Number: TMI-120421400002
TeraFlex Falcon Sport Toyota 4Runner Shock Absorber Systems
Shock Kit, Falcon Sport, Standard Mount, Monotube, Toyota, Kit
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Estimated Ship Date: Oct 23, 2026 Would you rather pick it up?
Overview
TeraFlex Falcon Sport Toyota 4Runner Shock Absorber Systems
TeraFlex Falcon Sport Toyota 4Runner shock absorber systems deliver increased stability and control, as well as improved ride quality and comfort both on- and off-road. These compact and affordable shocks are ideal for daily driven vehicles, particularly 2010+ models.
Zone Rate Tuning manipulates the factory linear-rate spring tuning to produce three distinct performance zones with a more exaggerated spring curve to tackle various driving conditions. An internal negative-rate spring offsets the factory spring's preload while in the Extension Zone. This eliminates top-out clunk and shock stress at full extension, while softening tire landing and reducing body roll on impact during aggressive driving. The factory spring rate is unaffected in Drive Zone for a comfortable and controlled ride. A provided progressive microcellular bump stop effectively retunes the spring rate while in Compression Zone to reduce bottoming and body roll during aggressive driving.
Traditional velocity-sensitive shock absorbers react quickly during low-speed driving, causing excessive "head toss" on rough terrain—or even driveways. Conventional damping then firms up during faster speeds, resulting in a jarring ride. Falcon's proprietary Volume Optimized Damping (VOD) features a digressive linear valve that produces quicker ramp-up for increased damping volume, which improves vehicle feedback and control during low-speed driving. VOD also improves the shock absorber's ability to reduce bottoming out at full compression during faster speeds or over uneven terrain.
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