Dynojet 424xLC2 · Live

Precision Dyno Tuning
& Performance Builds.

ASE-certified technicians. HP Tuners, EcuTek & Cobb platforms. Real results on our Dynojet 424xLC2 — Georgetown Township, MI.

100+ vehicles tuned since 2024

  • ASE certified
  • HP Tuners · Cobb · EcuTek
  • Stepped pulls · safe limits
Dyno · Run 04
424xlc2
SESSION
01314023580338904 · 168
Peak HP
168whp
Peak TQ
299lb·ft
Gain HP
+78
Gain TQ
+85
Calibration · Pass 1/3
23%
src · subaru-logger.csv + 3 logstarget λ · 0.81
load%100887562503825120
10
11
14
17
22
26
30
31
30
27
22
17
13
10
8
9
11
15
19
24
28
30
29
26
22
18
14
12
10
10.3
1k2k3k4k5k6k7k
// edit logstreaming
  • 12:42:09▼ -0.5VE1k·75L
  • 12:42:09▲ +0.4IGN7.5·88L
  • 12:42:08▲ +2.8VE7k·88L
cursorcobb · vf
13.1▲ +2.7
1.5 rpm · 75% load
P113.0P213.9P314.0
VE6
36
Marketplace · Now live

Source the parts.
Build the car.

Performance parts, accessories, and gear shipped direct from independent sellers. Curated for the platforms we tune — no catalogs, no middlemen, no waiting on dealership backorders.

  • Curated catalog

    Vetted parts for the platforms we tune — Subaru, BMW, GTR, Mustang, Mopar.

  • Shipped direct

    From independent sellers straight to your door. No middlemen, no markups.

  • Tune-tested

    Hardware combinations our shop runs in real builds, on real dynos.

What we do

Services we offer

From baseline pulls to full builds — every service done in-house, on real hardware, by ASE-certified hands.

Why Dyno Tune?

Increased Drivability

We dial out factory torque management and optimize throttle mapping for smoother, more responsive power delivery.

Maximum horsepower gains from custom dyno tuning at Rapid Racing

Maximum Power

Custom fuel, timing & boost calibrations tailored to your mods, fuel type, and power goals.

Dynojet 424xLC2 dyno with real-time safety monitoring at Rapid Racing

Safety and Precision with Dynojet 424xLC2

Real-time monitoring of AFR, EGT, knock & boost on every pull. Stepped runs ensure your engine stays safe.

Stronger/Faster Acceleration

Optimized torque curves, reduced spool time on turbo cars, and a broader, flatter power band where it counts.

What Our Customers Say

"Brought my M4 in for an EcuTek flash after bolt-ons. Throttle response is night and day — pulls hard through the whole rev range. Dyno sheets showed the gains clear as day."

Marcus Johnson

2021 BMW M4

+62 whp / +58 wtq

"Had my Mustang GT tuned on HP Tuners after intake and exhaust. The mid-range torque improvement is huge and it drives smoother than stock. Professional from start to finish."

Sarah Chen

2023 Ford Mustang GT

+48 whp / +41 wtq

"EcuTek tune on my GT-R after downpipes and an intercooler upgrade. They walked me through every change on the dyno screen. Already booked my next visit for E85 flex."

David Ramirez

2022 Nissan GT-R

+85 whp / +79 wtq

Makes We Service

Alfa Romeo logo - serviced at Rapid RacingHonda logo - serviced at Rapid RacingAudi logo - serviced at Rapid RacingFord logo - serviced at Rapid RacingInfiniti logo - serviced at Rapid RacingBMW logo - serviced at Rapid RacingPorsche logo - serviced at Rapid RacingLexus logo - serviced at Rapid RacingChevrolet logo - serviced at Rapid RacingNissan logo - serviced at Rapid RacingMercedes logo - serviced at Rapid RacingDodge logo - serviced at Rapid RacingToyota logo - serviced at Rapid RacingAlfa Romeo logo - serviced at Rapid RacingHonda logo - serviced at Rapid RacingAudi logo - serviced at Rapid RacingFord logo - serviced at Rapid RacingInfiniti logo - serviced at Rapid RacingBMW logo - serviced at Rapid RacingPorsche logo - serviced at Rapid RacingLexus logo - serviced at Rapid RacingChevrolet logo - serviced at Rapid RacingNissan logo - serviced at Rapid RacingMercedes logo - serviced at Rapid RacingDodge logo - serviced at Rapid RacingToyota logo - serviced at Rapid Racing

Engine Performance Services

From bolt-on tunes to full engine builds, we work with you to find the right balance of power, reliability, and drivability. Our ASE-certified technicians use HP Tuners, EcuTek, and Cobb to calibrate across all major platforms — backed by real-time data on our Dynojet 424xLC2.

Schedule an Appointment for engine performance
Car on Dynojet dyno at Rapid Racing performance shop
Dyno Tuning
Custom ECU tuning and calibration at Rapid Racing Grand Rapids
Custom ECU Tuning
Performance engine upgrade at Rapid Racing
Performance Upgrade
Engine diagnostics and data logging at Rapid Racing
Engine Diagnostics

How It Works

Schedule

Book your session online — pick your service and a time that works.

Consultation

We review your goals, mods, and vehicle condition before any wrenching.

Dyno Session

Baseline pulls, real-time data monitoring, and iterative calibration on the Dynojet.

Results

Full before/after dyno sheets and a data-backed summary of every change we made.

Witness the Transformation

Performance engine bay build at Rapid Racing
Vehicle on Dynojet 424xLC2 during tuning session
Customer performance car upgrade at Rapid Racing Grand Rapids
Customer car build showcase at Rapid Racing Grand Rapids
Before and after dyno tuning transformation at Rapid Racing

See the Difference

Actual before/after dyno sheets from our Dynojet 424xLC2. Drag the slider to compare.

Dyno results chart after professional tuning at Rapid Racing Grand RapidsDyno results chart before tuning at Rapid Racing showing baseline horsepowerBeforeAfter
100+Vehicles Tuned Since 2024
15,000+Total WHP Gained
4.9★Google Rating
10+Years in Business

Schedule An Appointment

Whether you need a custom tune, a bolt-on install, or a full engine build — our ASE-certified team is ready. Tell us your goals and we'll put together a plan.

  • Free initial consultation
  • Dynojet 424xLC2 chassis dyno
  • ASE-certified technicians

Prefer to talk?

(616) 263-1095

Schedule your Appointment

Tell us about your vehicle and goals — we'll handle the rest.

Most appointments confirmed within 24 hours

Get Started