Subaru performance engine build in the Rosa Motorsports shop in Gordonville, PA
Subaru Performance · Fabrication · Gordonville, PA

Built in‑house. Proven on our dyno.

Rosa Motorsports builds and tunes Subaru WRX/STI platforms — big turbo kits, flex fuel, standalone ECUs, EJ engine builds and custom fabrication — and every build leaves with a real pull on our in‑house MD1100AWD dyno.

In‑house MD1100AWD dyno E‑tuning for out‑of‑state customers We don't like small turbos
The MD1100AWD

The proof is in the pull

Plenty of shops tune off a laptop and a feeling. We calibrate on our own all‑wheel‑drive MD1100AWD dyno — verifying power, fueling and safety across the whole RPM range before your keys come back to you.

Not local to Lancaster County? Our e‑tuning program delivers the same custom calibration remotely, revision by revision.

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What we do

Performance work, start to finish

From a stock 15+ WRX to a fully built EJ on a standalone — the engine work, the fabrication and the tune all happen under one roof.

Car strapped down for tuning on the Rosa Motorsports dyno

Dyno Tuning

In‑house calibration on our MD1100AWD dyno. Real numbers, safe fueling, and a printed sheet to back it up. Dyno rentals available too.

E‑Tuning

Not near Gordonville? Remote tuning gets you a custom calibration for your setup — datalogs in, revisions out, until it's right.

Subaru EJ engine build on a stand at Rosa Motorsports

EJ Engine Builds

Subaru EJ builds, repair and performance work — from healthy refreshes to big‑turbo longblocks built to hold the power you're after.

2015+ Subaru WRX FA20 performance work in the shop

15+ WRX FA20

Platform‑specific performance work for 2015+ WRX FA20 cars — bolt‑ons through built setups, tuned for how you actually drive it.

Plug-and-play standalone ECU kit wiring at Rosa Motorsports

Plug & Play ECU Kits

Plug‑and‑play EMtron kits that make a standalone conversion simple — modern engine management without hacking up your harness.

Custom standalone ECU wiring harness fabrication

Standalone ECUs

Full standalone installs with custom wiring and tuning — the right path for swaps and serious builds that outgrow the factory ECU.

  • Turbo Kits
  • Flex Fuel Tuning
  • Custom Exhaust & Headers
  • Engine Swaps
  • Custom Fabrication
  • Dyno Rentals
Get My Build Quote See All Services Subaru specialists — we also take on Corvette and Hyundai performance work.
Why Rosa Motorsports

Your build, explained — not just handed back

  • We teach, we don't gatekeep.

    We take the extra time to walk you through your build — how to maintain it and operate it safely, so you get the most out of your investment.

  • Tuned in‑house, not outsourced.

    Advanced diagnostics and precision calibration on our own AWD dyno. The people who built it are the people who tune it.

  • Fabricated to fit, not forced.

    Turbo kits, headers, exhausts and swap wiring made custom for your car — because off‑the‑shelf doesn't always cut it.

Straight talk: we're not the shop for a quick, cheap flash tune. We're the shop that builds it right, proves it on the dyno, and shows you exactly what your car is making.
MD1100AWD dynamometer at Rosa Motorsports available for rental
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MD1100AWD dyno rentals

Tuner bringing your own laptop? Chasing baseline numbers before a build? Our all‑wheel‑drive dyno is available for rental sessions — reserve your time on the rollers.

Reserve Dyno Time
From the bay

Recent builds & shop work

Longblocks, swaps, fab work and dyno days — straight from our Instagram, where our customers follow every build.

Get in touch

Tell us about your car

Send the basics and we'll call you within one business day to talk goals, parts and timeline. No pressure, no obligation.

Why builders choose us

  • In‑house MD1100AWD all‑wheel‑drive dyno — tuned and verified on site
  • Subaru WRX/STI specialists: EJ builds, FA20 work, turbo kits, flex fuel
  • Standalone ECU wiring & plug‑and‑play EMtron kits
  • We walk you through your build so you can maintain it and run it safely

Prefer to talk?

(717) 405‑9113

Rosa Motorsports · Gordonville, PA — serving Lancaster County and beyond, with e‑tuning nationwide.

Rosa Motorsports shop in Gordonville, PA
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