Kyosho IF434 Suspension Holder Set Inferno MP9

This is the suspension holder set for the Kyosho Inferno MP9.

Suspension holders are the blocks that clamp the arm hinge pins to the chassis, and they are geometry parts rather than simple brackets. Where a holder positions the inner pivot determines roll centre, anti-squat and kick-up, which together control how the car reacts under throttle, how much it rolls through a corner and how it handles bumps. That is why manufacturers sell them in a range of offsets and why racers change them as a tuning step rather than only when something breaks.

They also take real structural load. Every force the suspension generates passes through the hinge pins and into these blocks, so they are common casualties of heavy impacts, and a cracked holder lets the pin move, which quietly changes your geometry before it visibly fails.

This is supplied as a set covering the front upper and rear lower positions. Dealers note the bushing inserts are replaceable, so worn bushings can be renewed without buying whole new holders. Kyosho lists it across the Inferno MP9, MP9 TKI through TKI4, MP9e and MP9e Evo., and Inferno GT3.