StacksVerified U.S. regulatory reference

40 CFR Part 60, Table 5

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov
Engine powerStarting model year
19≤KW<56 (25≤HP<75)2013
56≤KW<130 (75≤HP<175)2012
KW≥130 (HP≥175)2011