From the 4.6L Two-Valve to today’s 5.0L Coyote and S650 Dark Horse, Lethal Performance carries every performance upgrade your Mustang GT needs. Shop superchargers, exhaust systems, clutches, fuel systems, suspension, and more — backed by dyno data and proven results from our in-house builds. Whether you’re restoring an early GT or chasing 1,000+ HP in a modern Coyote, we’ve got the parts to get you there.
A taste of Mustang GT 5.0L performance by generation—stock baselines, proven power ceilings, track results, and the parts and builds we used to get there.
The first Coyote 5.0L set the template: strong heads, rev-happy character, and an aluminum block that responds well to moderate boost with smart fueling and cooling support. Shown here: our 2013 GT running a Roush/TVS supercharger kit with ID1050x injectors on 93 octane—rock-solid mid-600s on stock internals.
Early S550 validation for supercharger applications. With proper intercooling, octane, and a dialed-in fuel system, Gen 2 delivers reliable mid-600s on stock internals. Our 2015 GT shows how stable the combo can be when the install and tune are on point.
The Gen 3’s improvements (bores, fueling, valvetrain) make it a durability standout under boost. Our 2018 GT achieved repeatable 8-second passes on stock internals with correct fueling and tuning—the sweet spot for budget drag performance.
The S650 is the most advanced Mustang to date. Our Dark Horse cleared 1000+ HP on stock internals with a KPM fuel system and custom tuning from Shoemaker Performance.
Why it’s great: Gen 1’s cylinder head flow and rev-happy nature love moderate boost. With conservative timing and good fuel, mid-600s WHP on stock bottom end is realistic for a street car.
Stage 1 (Street Response): Intake + cat-back + custom tune → crisp throttle, +35–50whp.
Stage 2 (FI, 550–650whp): Supercharger (TVS/Whipple), ID1050x, fuel pump upgrade, proper heat management.
Watchouts: Keep IATs in check, don’t skimp on octane, and verify fuel pressure under load. Add a built bottom end if you want to live above ~650whp regularly.
Why it’s great: Gen 2 validated the S550 chassis for blown street cars. With a quality blower kit, intercooling, and fueling, reliable mid-600s are common on stock internals.
Stage 1 (Bolt-Ons): CAI, exhaust, tune → +40–60whp and better drivability.
Stage 2 (FI, 600–700whp): Whipple/TVS, injectors, pumps/boost-a-pump, colder plugs, and solid MAF/VE scaling in the tune.
Watchouts: MT-82 clutch slippage at torque—plan a clutch. Mind IAT and fuel quality. Track use benefits from extra cooling.
Why it's great: Head/valvetrain refinements + DI/PI fueling = durability under boost. With a blower/turbo, proper octane, and a real fuel system, 650–750+whp is easily achievable—and we backed it with 8-second time slips.
Stage 1 (>600rwhp): CAI, exhaust, tune.
Stage 2 (650–750whp): Whipple/turbo, fuel system upgrades, colder plugs, careful spark/fuel mapping.
Stage 3 (800+): Forged bottom end, high-octane fuel, advanced cooling, aggressive calibration.
Better than ever: Now that tuning is unlocked, they really love boost and E85. Our Dark Horse cleared 1000+ HP on stock internals with a complete fuel solution and meticulous calibration; GTs feel perfect in the 700s for street/track balance.
Stage 1 (Bolt-Ons): CAI, exhaust, tune.
Stage 2 (FI, 700s WHP): Whipple + Fuel+ pump booster, and a Griptec
Stage X (4-digits): A full fuel system and a who gets things done.
Start with a cold air intake, cat-back exhaust, and a custom tune for reliable gains and better throttle response. Shop the core upgrades in our intakes, exhaust, and tuning sections.
Whipple and TVS (Roush/VMP) kits are proven for street and strip. Pick based on power goal, drivability, and budget—then add the right fuel and cooling. See kits under Whipple and TVS options, and our Best Supercharger guide.
Typical targets: Gen 1 (2011–2014) ~550–650 whp FI; Gen 2 (2015–2017) mid-600s; Gen 3 (2018–2023) 650–750+ whp; Gen 4 (2024+) GT ~700s streetable, Dark Horse capable of four-digits with full fuel/cooling and pro tuning. Build paths are on each generation card above.
Yes—once torque rises, stock clutches slip. Match the clutch to your power and usage. Check out our Lethal Clutch Kits and our McLeod RXT vs RST comparison.
Plan on larger injectors (e.g., ID1050x) and an upgraded pump/return-style system, plus proper octane. Check out our Fuel System Upgrade guide and our Fuel System FAQ.
Yes—we have performance parts for every Mustang GT generation. When in doubt, contact us for fitment help.
Absolutely—our build pages include dyno sheets and track videos. Check out some of them: Project Betty White (2013 GT), 2015 GT, 2018 GT, Dark Horse, and 2024 GT.
Yes—custom tuning is available via RTD4 with top tuners from our Tune Shop. See S650 tuning devices & services, and our Custom Tuning FAQ for details.
Looking to build your Mustang GT but need some help? Our sales & tech representatives are ready to help you put together the ultimate build list, whether it's for a 450hp bolt on project or a full-on 8-second beast. Give us a shout.
