King SI-Series Standard Size Main Bearing Set - BMW / N52 / N54 / N55King SI Series bearings are recommended for OE applications. BMW STD Main Bearing Set Improve your engine's performance and replace old worn out OEM bearings with these long lasting, high quality Main Crankshaft Bearings by King Engine Bearings. Main crankshaft bearings hold your crankshaft in place, preventing it from being dislodged by forces from the pistons, and instead converting the reciprocating movement into rotation. King Connecting Rod

Improves performance and fuel economy

it has been tested for proper performance

THIS ITEM DOES NOT COME WITH TIPS BY DEFAULT

and more precise steering feel

and run two -10 fittings for your aftermarket oil cooler set up

Easy Check wear indicator system

the Eibach ANTI-ROLL-KIT sway bars come complete with all necessary mounting hardware and instructions for easy installation

Can be mounted anywhere

- Zimmermann OEM size

Refined Throttle Mapping for Part Throttle Drive-ability

4 L Flat Six M96

We chose appropriately sized HJS HD 200 cell catalysts to flow enough power for sustained high RPM use – where the GT4 is at home