i find the 12.5 are awesome, on the track on sunday they increase grip on the rear but not too much to make you understeer, the back was still able to slightly slide
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Red Escort 1.6LX
Then - Red Escort 1.4
Then - Silver Fiesta ST 170BHP
Then - White Fiesta ST MR200+
Now - Mitsubishi Evo IV Forged 2.3 500BHP
and Mondeo Mk3 2.0TDCI