Dynojet Research 4138 Jet Kit - Stage 1 and 3

Stage 1: stock engine/filters, stock/modified pipes; about a 5% power increase.
Stage 3: stock/mild modified engine, stock/modified pipes, individual air filters; drivability may be compromised, N/A for some motors; about a 10-15% power increase.

Average horsepower increases of 15%-25%!. Each DynoJet kit is precisely engineered to provide a simple and cost effective solution for all your riding needs. Kit includes jets, needle, spring, shim and instructions.

Vehicle Fitment:

2020-2023 Indian Challenger
2020-2023 Indian Challenger Dark Horse
2022-2023 Indian Challenger Elite
2020-2023 Indian Challenger Limited
1992-1998 Yamaha XJ600S Seca II