American tuner STaSIS Engineering has teamed up with APS of Brackley to present the Audi S4 Signature Series in the UK. These models feature powertrain and dynamic suspension and braking upgrades.

The S4 Signature features a supercharged V6, 3.0-litre TFSI engine with upgraded power from 333 bhp / 344 lb.ft of torque to 410 bhp / 370 lb.ft. STaSIS offers two S4s, Touring Edition and Challenge Edition. Both models are engineered to ensure maximum performance and factory levels of reliability.

The STaSIS Signature S4 packages are available now exclusively from APS of Brackley, with prices starting at £12,500 including VAT @ 20% and installation. Customers are also able to purchase individual Audi S4 STaSIS Signature series components from APS of Brackley on a piecemeal basis, with prices available on request.

Signature S4 Touring Edition

• Exhaust – Quad outlet with tunable low RPM resonators
• Engine – Engine Tuning Software – performance increases to 410 bhp / 370 lb.ft
• Suspension – 1 inch lower, Increased spring rate, anti-roll bar kit and matched bushings & bump stops
• Brakes – Optional high-performance street pads and braided stainless steel lines
• Wheels – 20 inch x 8.5 inch lightweight cast aluminum wheels, Optional 19 inch x 9 inch lightweight cast aluminum wheels
• Tyres – High performance

Signature S4 Challenge Edition

• Exhaust – Quad outlet with tunable high RPM resonators (recommended for manual transmission)
• Engine – Engine Tuning Software – performance increases to 410 bhp / 370 lb.ft
• Suspension – Ohlins SL dampers, increased spring rate and high performance anti-roll bar kit
• Brakes – 6-piston Alcon monobloc calipers, 370 mm 2-piece discs (390-mm optional), stainless steel brake lines & high-performance pads
• Differential – high-bias centre differential (manual transmission only)
• Wheels – 20 inch x 9.5 inch ultra-lightweight forged aluminum wheels
• Tyres – extreme performance

STaSIS Signature S4 Performance Specifications:-