HSR42 kit includes 150 through 170 main jets (2 each); 22.5 through 35 pilot jets (2 each);96,97 and98 needles (1 each); 2 #60 a/p nozzles; needle clip; all necessary washers, special jet boxHSR45 kit includes 165 through 185 main jets (2 each); 20 through 32.5 pilot jets (2 each);95,96 and98 needles (1 each); 2 #60 a/p nozzles; 2 O-rings, 4 jet needle E-rings; all necessary washersHSR48 kit includes 180 through 210 main jets (2 each); 20 through 32.5 pilot jets (2 each);95,96 and98 needles (1 each); 2 #60 a/p nozzles; 2 O-rings, 4 jet needle E-rings; all necessary washersSome kit components are available separately