BMW ZF DOGBOX BMW ZF S5D dogbox fits to E36 M3, 325 and virtually every other car model due to the compact size! Perfect companion to the PMC Motorsport adapter kits we offer! The gear set has a handful of special features built-in. Shifter mechanisms are completely rebuilt, to make them as robust and rigid as possible. Clutch shaft is stronger than original and can be built for other splines as well. Gear set can be fitted any many car models with aftermarket adapters or by bell housing modifications.  BMW DOGBOX The HD model gear set has been tested up to 1100hp/1100Nm in drag and drift racing.    Dogbox Features 5 Speed Dogbox gear set Re-designed stronger shifter mechanism Patented design to improve power handling capabilities Extremely strong gearing Dogleg shift pattern   Ratio set 1 (Long 1st gear, smaller drop between gears) [Rally / Track]: Gear ratios 1-5: 2.23, 1.71, 1.38, 1.16, 1.00   Ratio set 2 (“Longish” 1st gear, bigger drop between gears) [Drift / Drag / Rallycross]: Gear ratios 1-5: 2.73, 1.83, 1.42, 1.16, 1.00   IRP CUSTOM Shifter Features: Performance short shifter Adjustability to block reverse gear or 4-5th gears Made entirely of premium high grade materials Precisely CNC milled aluminum anodized with black color Easy installation For overall short-shifting perfection we highly recommend to use stiffer engine and gearbox mounts or at least check the condition of each before use.     HEAVY DUTY (HD) SHAFTS Options: Heavy duty shafts for high powered vehicles (over 500Hp/Nm): HD input shaft with T26 x 1-5/32″ or 1-1/8″ spline (same spline found in GM, MB, VW)  HD input shaft with Z10 35mm spline (ZF GS5-39 box spline)  HD counter shaft for giving an extra durability