SBT Cylinder Head Rebuild Kit 420254298 for Sea-Doo 4-Stroke GTI, GTX, RXP, RXT, GTR, Challenger 2003-2021

This SBT cylinder head rebuild kit, part number 54-112H, covers the internal valve train parts for Sea-Doo 4-stroke jet skis, including GTI, GTX, RXP, RXT, GTR, Challenger and Speedster models. It is cross-referenced to OEM 420254298 and is meant for a top end rebuild when valves, springs or stem seals are worn. Spark models are not covered, so check the fitment list or call us with your hull and year before ordering.

Fits

• Sea-Doo GTI / GTI 130 / GTI SE / GTI LTD (2006-2026)
• Sea-Doo GTR 215 / GTR 230 / GTR-X (2012-2026)
• Sea-Doo GTS / GTS 130 (2011-2016)
• Sea-Doo GTX 4-TEC / GTX 155 / GTX 215 / GTX 230 / GTX 300 / GTX LTD (2002-2026)
• Sea-Doo RXP / RXP-X (2004-2026)
• Sea-Doo RXT / RXT-X / RXT iS (2005-2023)
• Sea-Doo Challenger 180 / 210 / 230 (2005-2012)
• Sea-Doo Speedster 150 / 200 (2008-2012)
• Sea-Doo Islandia / Utopia (2006-2009)
• Sea-Doo Explorer / Fish Pro (2019-2026)

What's included

• Intake valves
• Exhaust valves
• Valve springs
• Inner valve springs
• Valve stem seals

Replaces OEM part numbers

420254298

Not sure it fits your ski? Call or text 954-914-6465 with your hull ID (HIN) and we'll confirm before you order.