Stock 2.5L bottom end — medium-frame top-mount. Near the limit, perfectly balanced.

Everyday fast with calm manners. Smooth torque shaping, boost-by-gear, and longevity-minded safeties—built on a refreshed OEM 2.5L bottom end.

Quick Specs

Bottom End
OEM 2.5L (L5) short block, refreshed bearings & seals — no internal forging

Turbo System
Medium frame • V-band top-mount • 3.0″ downpipe/exhaust

Output (dyno)
360–380 hp • 450–520 Nm (fuel, IAT, cooling dependent)

Calibration
Boost-by-gear • torque shaping • driveline/tyre protection

Stock Bottom Refreshed OEM bottom end keeps costs sensible and service simple. Power is delivered with a broad, usable band and smooth transients.

Near the Limit This is the upper edge of what a healthy stock L5 can sustain. We strongly recommend excellent intercooling, careful fuel choice, and strict thermal management.

ETHOS: Drivability first. Verified power second. Longevity always.

Build Sheet

Engine: OEM 2.5L L5 short block (compression/leak-down verified), refreshed bearings & seals
Turbo: medium-frame unit • V-band top-mount manifold • 3.0″ downpipe & exhaust
Intercooler: front-mount (medium core) • comprehensive heat shielding/blankets
Fueling: injectors & pump sized to target • closed-loop knock strategy • flex-fuel ready
Cooling: high-capacity radiator • oil cooler • airflow/ducting optimization
ECU: boost-by-gear, torque & temp-based limiters, gearbox & tyre protection

Upgrade path: If you want margin for heavy track abuse or 380+ hp, consider our forged-rod short block (moves you toward RAIJIN territory).

Chassis & Suspension

Aim: Fast everywhere, calm everywhere.
Monotube street/track coilovers (20–30 clicks usable)
Spring guide: 7.5–9 kg/mm F • 5–6 kg/mm R
Adjustable ARBs F/R • mixed rubber/poly bushings

Brakes & Alignment

Performance rotors • street/track hybrid pads • braided lines • race fluid
Balanced Align: F −2.0°…−2.4°, 0 toe • R −1.6°…−1.8°, slight toe-in

Safety & Structure

4-point rollbar recommended for regular track use
Bucket seat & 6-pt harness optional (retain OEM 3-pt for road)
Thermal/boost protections are configured to preserve the driveline

Build Idea

KENSEI embodies mastery and balance: a refreshed stock 2.5L with a medium turbo for broad torque, quick response and a reliable top end — the everyday fast NC, tuned right at the safe edge.

Turbo Architecture — One Layout, Scaled Output

Our shared V-band top-mount architecture keeps packaging clean, parts common and servicing simple. Power scales via turbo frame, intercooler capacity and short-block spec.

Tier	Short Block	Intercooler	Typical Output	Use
YAMI	OEM refreshed	Small–Medium	300–330 hp	Sleeper / Street
KENSEI	OEM refreshed	Medium	360–380 hp	Fast Road / Track Days
RAIJIN	Forged bottom	Large	450–500+ hp	Extreme

Cooling Focus KENSEI’s consistency depends on charge air temps. We size cores and ducting to your use (climate, track frequency, fuel).

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