alright, pacesetters bolt right in, picture to picture for 81-83 the RB looks to be same length/angle, but ive heard it only fits the presilencer.. also heard it does work.. so im asking..



(i know the whole 'pacesetters are garbage' talk, im not getting into that, but im not going thru the hassle of replacing the whole thing each year for inspection, and if i had the money id be doing the ISC exhaust, but im poor)

 

The RB will NOT bolt directly-up. Simplest solution is to get you local exhaust shop to make a short connecting pipe to go from the header to the stock main cat.