Just finished building the new TRF Short Damper #42273. From Tamiya: “These TRF Short Dampers are fitted as standard equipment in Item 84339 TB-04 PRO Chassis Kit. They are now available as a separate Hop-Up-Option for any Tamiya touring or M-chassis car. Users will find them particularly beneficial on high-grip, twisty circuits, as they give exceptionally fast response when cornering.”
Above on left #42102 (TRF Works Damper), middle #42273 (TRF short) and right #54000 (M Chassis Alum Damper). The spring on the right is overly compressed from me trying to get more ride height on my m-four before switching to (full length) TRF works (I should have returned the collar to top before taking the picture). I’ll have to take #84318 (TRF Works M-Chassis) off one of these days and compare all four.
From the back of the box it shows that these shocks are 4mm shorter than the regular works edition. Car has not been on track yet so I can’t yet say how it changes the car for me.