HONDA Civic XI (FL) since 2021
Manufacturers
HONDA Civic XI (FL) since 2021

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The Honda Civic XI Type-R (FL), 300hp, uses the 2.0 i-VTEC turbo K20C1. This page brings together its rotating assembly: a set of 4 forged connecting rods in 4340 steel for a 22mm gudgeon pin, listed on its product page for the FK2, FK8 and FL5 Type R. BOOSTLINE offers it with a three-pocket I-beam, WÖSSNER with an I-beam, each version supplied with its bolts. The ACL RACE or KING RACING crankshaft thrust washers complete it and control end float. No forged piston, head gasket or stud is listed for this version.
On the Civic XI Type-R FL5, 320hp, code FL574PE, the K20C1 takes the same forged connecting rod set as the FK2 and FK8 Type R: its product page lists it for all three generations. Three part numbers are offered: HN5658-866 and HN5658-866+ from BOOSTLINE, the first with ARP2000 bolts, the second with CA625+ bolts, and KCR363A from WÖSSNER with ARP2000 bolts. The rods are made of 4340 steel for a 22mm gudgeon pin. The ACL RACE or KING RACING thrust washer set completes the page, with no forged piston or head gasket.
For the Civic XI Type-R FL5, 330hp, and its K20C1, this page leads with the crankshaft thrust washer set: part number 1T1957-STD from ACL RACE or TW 140AM from KING RACING, both without anti-friction coating. The same set covers HONDA engines from 1.5 to 2.4 litres. It controls crankshaft end float and goes with the 4340 steel forged connecting rods offered alongside by BOOSTLINE and WÖSSNER, for a 22mm gudgeon pin. Forged pistons, head gasket and head studs are not listed for this version.
Reinforced Cometic and Athena head gasket, in multi-layer MLS. Sold individually, one gasket per engine.Brands: Cometic, AthenaEngines: K20C1, K20C4Bore: 86.75 to 88 mm (MLS)Thickness: 0.71 to 1.07 mmReplaces: 12251-RPY-G02
Set of ACL RACE / KING RACING thrust washers for HONDA 1.5 1.6 1.8 2.0 2.2 2.3 2.4 engines
Set of 8 trimetal connecting rod half-bearings for the Honda K20 and K24.Brands and treatments: ACL Race, ACL Calico and King Racing XPC Compatibility: Civic Type R, Integra Type R, Accord, CR-V, Element, Odyssey Engine codes: K20A2, K20Z1, K20C1, K24A1, K24A3, K24A4, K24A8, K24Z1 Available sizes: standard to +0.50 mm, increased-clearance versions (HX,...
The HONDA Civic XI (FL) runs the 2.0 16V i-VTEC turbo K20C1, rated from 300 to 330hp across the Type R versions (FL5, FL574PE). This page gathers the bottom-end parts we stock for that engine.
Forged rods are the first safeguard on a tuned K20C: they take the boost pressure and the engine speed that the standard rod can no longer handle once torque is raised.