Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Increase of +111 Horsepower, and +272 Torque! Eliminate top speed limiter, Increased throttle response. W.1 Tunes are designed for completely stock vehicles with no other modifications!
This software is only compatible with Windows PC / Laptop.
Increase of +159 Horsepower, and +322 Torque! Eliminate top speed limiter, Increased throttle response. W.2 Tunes are designed for vehicles with performance exhausts & high-flow air filters!
This software is only compatible with Windows PC / Laptop.
Replacement factory turbocharger - Brand New Unit, No Core Charge
For those trying to make big power, this can push you up to 1200WHP with supporting mods, and tuning.
Upgrade your M157 AMG or M278 with the UPD Billet Idler Kit - CNC-machined aluminum pulleys built to eliminate factory plastic idler failures and deliver lasting performance and reliability.
Average gain of 85 horsepower and 100 lb-ft of torque
M157 / M278 Head Bolt - One Time Use. A full set to secure your cylinder head.
This product was last offered at the strikethrough price on
03-11-2026
Replacement factory turbocharger - Price includes a refundable $296.40 core charge
This product was last offered at the strikethrough price on
05-05-2026
Replacement factory turbocharger - Price includes a $276.90 refundable core charge
This product was last offered at the strikethrough price on
05-05-2026
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Unlock hidden M157 power with the UPD Cold Air Induction Kit - OEM style fitment with dyno-proven gains of up to 25WHP!
M157 / M278 Head Bolt - One Time Use. A full set to secure your cylinder head.
2X Entries For Our 25th Anniversary Sweepstakes!
M157 / M278 Head Bolt - One Time Use - Twenty (20) Required Per Engine
2X Entries For Our 25th Anniversary Sweepstakes!
The stock HPFP on the M278 Motors is severely limited in capacity when trying to raise the output of the motor. The FX-170 adds 50% more flow, raising the fueling limits and helping you achieve more power!
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button