AMS Performance

AMS Performance (formerly Automotosport Inc.) has been engineering world-record-breaking performance exhaust systems and turbo upgrades in West Chicago, Illinois since 2001. Founded by mechanical engineer Martin Musial and childhood friend Arne Toman, AMS began with 2.3L turbocharged Ford Mustangs before transitioning to become the dominant force in Japanese and German turbocharged vehicle performance.

What started as a two-man operation designing camshafts has evolved into an engineering powerhouse with in-house dyno facilities, CAD/CAM design capabilities, and a track record of building some of the fastest street-legal turbocharged vehicles in the world. AMS-powered vehicles hold numerous world records and championship titles across drag racing, roll racing, and road course competition.

Alpha Performance Exhaust Systems:

The Alpha Performance brand represents AMS's flagship line of exhaust components designed for maximum flow and proven power gains. Every Alpha exhaust system is engineered using SolidWorks CAD software and validated on AMS's in-house DynoJet chassis dynamometer.

Popular AMS/Alpha Exhaust Applications:

Nissan GT-R (R35): The platform that established AMS as a GT-R tuning authority. Alpha GT-R exhaust systems include:

Alpha 90mm Widemouth Cast Downpipes: Precision-cast 304 stainless steel downpipes engineered with 90mm (3.5") primary pipes versus the restrictive 76mm (3") alternatives. During testing, AMS's shop GT-R gained 100 wheel horsepower and 130 lb-ft of torque with Alpha turbo upgrades and downpipes alone. Turbo spool improved by 400 RPM.

Alpha 102mm Titanium Exhaust: One of the largest exhaust systems available for the R35, featuring 102mm primary piping (28% more cross-sectional area than standard 90mm systems). AMS has documented up to 100 horsepower gains when high-horsepower GT-Rs upgrade from 90mm to the 102mm titanium system. Includes twin 11.75" mufflers for controlled exhaust tone.

Alpha 90mm Race Exhaust: Free-flowing cat-back system with optimized routing featuring mild bends for maximum efficiency. Incorporates a 90mm primary pipe that flares into dual 76mm secondaries with four polished OEM-style tips.

Alpha Package Systems: Complete bolt-on performance packages from Alpha 6 (stock turbo optimization achieving 10.6 @ 130 mph quarter-mile times on pump gas) through Alpha 12 and beyond (8-second capable systems). Each package includes exhaust components calibrated specifically for the turbo configuration.

Infiniti Q50/Q60 (VR30DETT): AMS partnered with Infiniti USA to develop the Red Alpha concept vehicle showcased at SEMA. Red Alpha exhaust systems include:

Red Alpha Lower Downpipes: Full 3" mandrel-bent stainless steel downpipes producing 20+ horsepower gains with the Red Alpha ECU calibration, all without triggering check engine lights.

Red Alpha Full Downpipes: Complete downpipe system replacing from turbo outlet to catalytic converter with smooth 3" stainless construction and turbine flanges for optimized flow transitions.

Red Alpha Cat-Back Systems: Complete exhaust solutions designed to work seamlessly with Red Alpha turbo upgrades and calibrations.

Mitsubishi Lancer Evolution (EVO VIII, IX, X): Where AMS built its reputation in the DSM/4G63 community. AMS pioneered adapter plates allowing Garrett T3/T4 turbos to bolt onto 4G63 engines, along with custom O2 housings and downpipes. AMS's famous HKS 272 camshaft comparison test remains the definitive reference for 4G63 builders.

Mercedes-AMG (C63, E63, CLA45, A45): Alpha turbo outlet pipes and exhaust systems engineered for AMG's twin-turbo applications. AMS's shop E63 AMG with 5.5L Biturbo Upgrade and Alpha 9 Package logged 10.7 @ 129 mph quarter-miles while maintaining full interior weight.

Toyota GR Supra (A90/A91): Catted and race downpipes for the B58 3.0L inline-six turbo engine, designed for both 2020+ models and chassis-specific fitment requirements.

Ford F-150 EcoBoost (3.5L Twin-Turbo): Returning to AMS's Ford roots with stainless steel downpipes featuring 24.7% increase in cross-sectional area at the inlet (largest on the market) and turbine housing adapters with smooth transitions for reduced backpressure.

Porsche 911 (991 Turbo/Turbo S), VW Golf R (MK7), Lamborghini Huracán, and Audi R8: German performance platforms benefiting from AMS's forced induction expertise.

AMS Engineering Approach:

Every AMS exhaust component undergoes rigorous development using advanced engineering tools:

SolidWorks CAD Design: All components are 3D modeled for optimal flow characteristics and fitment before production begins.

In-House DynoJet Testing: AMS operates multiple chassis dynamometers at their West Chicago facility for real-world performance validation.

Cast Precision Components: Alpha Widemouth Downpipes use investment casting in 304 stainless steel rather than fabricated construction, eliminating weak welded seams prone to cracking while allowing complex geometries impossible with traditional fabrication.

Mandrel Bending: All tubing is mandrel-bent to maintain consistent internal diameter through bends, eliminating flow restrictions.

Track Validation: AMS-equipped vehicles compete regularly in drag racing, half-mile events, and road racing to prove real-world durability and performance.

Why Choose AMS Performance:

World Record Performance: AMS has powered the fastest street-legal EVO, multiple 8-second GT-Rs, and world-record Infiniti Q50/Q60 builds. Their shop vehicles consistently achieve 9-second and 8-second quarter-mile times.

Complete Performance Packages: From Alpha 6 through Alpha 20+ systems, AMS offers complete turnkey packages with exhaust, turbos, intercoolers, fueling, and calibration perfectly matched for specific power goals.

Over 20 Years Experience: Since 2001, AMS has specialized exclusively in turbocharged performance for Japanese and German vehicles.

American Engineering: All AMS products are designed, tested, and manufactured at their West Chicago, Illinois headquarters at 1760 Metoyer Court.

Whether you're building a 600hp street GT-R or chasing 2000+ horsepower drag records, AMS Performance exhaust systems provide the proven foundation for reliable, extreme performance.