Fueling, cooling, and the calibration to use it all.
Stage 3 is the full charge-path and fueling package with a calibration that actually exploits it — the point where the platform makes serious, repeatable power. We spec the kit from what your engine needs, build the tune around it, and document every choice.
Outcome ranges are chassis-specific. Tell us your car and we’ll show your platform’s Stage 3 band — drawn from what these engines actually make on this stage.
— whp on this chassis (tuned + E-mix, full ladder published). Read as a range, not a hero number.
Charge-path + cooling + fueling Core · matched Stage 3 calibration · revisions · documentation.
Where the dyno number gets serious. Stage 3 is where the OEM bottlenecks become real and a generic map starts costing money or parts. The kit builds the right charge-path AND fueling AND tune as one thing — so the calibration uses what's installed, not a guess.
What's in the Stage 3 Kit.
Stage 2 Core
Charge-path complete: downpipe, charge pipe, intercooler (or chargecooler for chargecooled M). Stage 3 builds on it.
Stage 3 Core (fueling)
HPFP, LPFP, port injection, or water-meth — picked per engine. Stage 3 is where fueling becomes the bottleneck.
Matched Stage 3 calibration
Built to your exact charge-path + fueling. The kit + tune ship together.
Charge-path, fueling, and the calibration — designed together.
Repeatable
The point where the platform makes serious power, not just a one-pull peak.
Per engine
We pick the fueling path based on what the engine actually needs (any-of HPFP/LPFP/PI/meth).
Every choice
Why this fueling, why this calibration — written down.