SPOOL Performance

ATC13 upgraded transfer kit - now available!
Billet 4340 custom hub
Nitrided for exceptional hardness
CFD optimized spline engagement and oiling pathways
11 clutch FX-TRT clutches

Dont miss out on our IFX-1100 sale ending March 15th!!

1000+ WHP capable
Ceramic dual ball bearing CHRA
MAR-M246 turbine wheel
True bolt-on stock location bolt on upgrade! NO CORES

Proven 900+ WHP on stock engine cars.

Now $3,999.

If you’re serious about S58 power with zero hassle, this is the move.

Fits:
G87 M2 • G80 M3 • G82/G83 M4 • X3M • X4M

bmwtuning bmwperformance bmwboost