M-Chassis Aluminum Big Bore Dampers+ (4pcs.)

Elevate your M-Chassis performance with this high-end damping upgrade from Tamiya’s TRF line. Designed for serious racers and tuning enthusiasts alike, this damper set delivers refined control, improved grip and enhanced durability for your M-series touring car.

By replacing the stock dampers with the 42355 Big Bore set, you gain the benefits of a larger cylinder diameter (0.5 mm wider than standard), allowing for roughly 10 % more oil capacity — which translates to smoother damping, better absorption of track irregularities, and more stable ride behaviour.

The shorter overall damper length (approximately 4 mm less than standard) is tailored for short-damper setups, enabling lower centre of gravity and improved handling on tight or high-grip circuits.

Key Features:

• Four-piece damper set, including cylinders, titanium-coated piston shafts and high-performance silicone O-rings for reduced friction and long life. 

• Aluminum spring retainers and an attractive black finish on aluminium components, providing both aesthetic appeal and structural integrity.

• Included springs: two yellow and two red, allowing initial tuning flexibility out of the box. 

• Compatibility: Built for M-Chassis models and touring cars employing short-damper stays — although best performance is achieved when paired with the correct damper stay setup. 

Why upgrade?
For racers looking to push their M-Chassis to the next level, the 42355 Big Bore Dampers+ offer a tangible improvement in handling consistency and response. The increased oil volume helps maintain stable damping over longer runs, reducing “fatigue” in the suspension and improving tyre contact. The shorter length enables a lower ride height and quicker suspension response, which can be especially beneficial in fast-flowing tracks or high-grip surfaces.

Who is it for?
If you run M-Chassis cars (such as the M-05, M-06, M-07, or M-08) and you want premium hop-up performance — especially for race-tuned setups — this damper set is an excellent choice. For casual hobby use, the upgrade may still be worthwhile for the polish it brings, though entry-level setups may not exploit every benefit.

Installation & Setup Tips:

• Ensure you use the correct damper stays for short damper setups if required (e.g., on the M-07 chassis). 

• Choose damper oil viscosity in line with your track conditions — the big bore allows more oil, so tuning oil grade and preload will significantly influence performance.

• Monitor ride height and camber after installation because the geometry may differ from stock dampers due to the changed length and stiffness.

• Use the included red and yellow springs as your baseline; then experiment with alternative springs to match your driving style or track grip.