Selling RB20DET RB71C #1 gearbox Bought for a project from someone on DW but never ended up using it. Has just sit in my workshop since. 5 speed RB20DET box with Kangaroo stamped on the side RB71C #1 - this is from an A31 and is known to have stronger synchros than counterparts. Sought after RB20 box. Come get it! Offers