CWC LS1 Alternator Bracket and Pulley Kit for RB Engines Mount a GM LS1 alternator to your RB25DET or RB26DETT engine with the CWC Alternator Bracket and Pulley Kit. LS alternators are easy to access in USA unlike the original RB alternators. LS1... MSRP: Was: Now: $169.00 Add to Cart