JDM FWD /// platform file
Honda K-swap Civic / Integra build guide
K24 · 2.4 NA I4 swap. What the stock hardware reliably supports, where it breaks first, and the fastest safe path to more.
The Honda K-swap Civic / Integra makes 205 hp stock at roughly 2,500 lb (12.2 lb/hp). Its stock internals are good for about 500 hp, the fuel system for around 280 hp, and its naturally aspirated setup tops out around 285 hp without forced induction. Below is the limit sheet carbuildcheck analyzes against, plus the platform's documented weak points.
01 Factory card
Stock power205 hp
Curb weight2,500 lb · 12.2 lb/hp
LayoutFWD
InductionNaturally aspirated
02 What stock parts support
Engine internals~500 hp
Fuel system~280 hp
Induction ceiling~285 hp
Clutch (manual)~260 hp
Transmission (auto/DCT)~300 hp
Cooling (sustained)~320 hp
Community-documented crank-hp planning figures, conservative by design. How these are used in the score →
03 Where it breaks first
Stock-sleeve K24s take ~450 hp with a good tune — the block is rarely the problem, the budget tune is.
Swap-car rule: mounts, wiring, cooling and brakes done properly before power. The fast ones are the finished ones.
04 The typical path
Intake → headers → tune → cams or forced induction. NA gains are honest but small; the big unlock is boost, and boost starts at the fuel system.
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