The K24 family, Honda’s 2.4-liter powerhouse, can deliver a wide range of horsepower depending on the variant, tuning, and whether you boost it. In short, stock K24s generally produce about 160–205 horsepower; with common modifications, naturally aspirated builds can reach around 230–320 hp, and turbo/supercharged setups can exceed 400 hp, with 500–600+ hp possible given robust supporting mods.
Understanding the K24 family
The K24 is part of Honda’s K-series engine family introduced in the early 2000s and used across a range of models—from sedans and SUVs to performance sedans. Different variants (such as K24A1/A2 and K24Z families) produce different factory outputs, but all share a 2.4-liter displacement and a strong aftermarket ecosystem that makes horsepower growth a well-trodden path. The horsepower you can expect depends on the exact variant, year, and whether the engine is modified or boosted.
Below are typical stock horsepower ranges you’ll encounter across common 2.4L K-series variants:
- Base 2.4L variants (CR-V, some Accord trims): roughly 160–170 horsepower.
- Performance-oriented variants (e.g., TSX with K24A2): about 205 horsepower.
These numbers reflect widely published specs and typical factory ratings; exact figures vary by model year, market, and calibration. For any project, check the specific engine code and factory rating for your vehicle, and calibrate expectations accordingly.
How horsepower can be increased
Naturally aspirated upgrades
Increasing horsepower on a K24 without boosting involves a combination of air, exhaust, and tuning work. The most common, proven upgrades and their typical impact are listed below. Actual gains depend on the rest of the build, tuning, and supporting hardware.
- Intake improvements (cold-air intake, larger throttle body, intake manifold upgrades): roughly 5–40 hp depending on configuration and tune.
- Head and exhaust work (headers, high-flow cat-back exhaust, porting): about 10–60 hp with proper flow and tuning.
- Camshafts and valvetrain upgrades: commonly 20–60 hp, especially with matching compression and ECU tuning.
- Porting, ITBs (individual throttle bodies), and manifold work: 30–70 hp with optimized airflow.
- ECU tuning (Hondata, K-Tuner, or similar): typically 10–60 hp on a well-optimized NA setup.
In practical terms, a well-planned naturally aspirated build can push a K24 into the 230–320 hp range, with peak numbers usually occurring at higher RPM and with careful tuning. A reliable NA project requires attention to internals, cooling, and fuel delivery to sustain power into the upper rev range.
Forced induction
Turbocharging or supercharging a K24 is a popular route to big power, but it requires substantial supporting modifications to avoid reliability problems. The typical power ranges you’ll see in boosted builds are outlined here.
- Turbo or supercharger with a conservative boost level and supporting upgrades: approximately 350–420 hp.
- Turbo with a built bottom end and forged internals, plus optimized fuel and intercooling: commonly 450–600+ hp, depending on boost and reliability constraints.
- Fuel system and management upgrades (injectors, pumps, ECU, fuel rails): essential across the board for boosted setups to maintain safe air/fuel ratios.
As with NA builds, actual output varies with boost, tuning, fuel system capacity, and engine internals. Expect significant investment in engine internals, cooling, exhaust, and ECU mapping to reach the higher end of these ranges.
Summary
The horsepower ceiling for a K24 is highly variant, driven by the exact variant and the extent of modification. Factory ratings typically land in the 160–205 hp range. With bolt-on NA upgrades, you can commonly reach about 230–320 hp; with forced induction, 400–600+ hp is achievable, given robust supporting systems and proper tuning. Prospective builders should plan for cooling, fueling, and ECU control to maximize power safely.