AMS Performance Alpha Cast Downpipe for Nissan GT-R 2009-2021

VENDOR: AMS Performance

SKU: ALP.07.05.0001-1

All orders will include an AutoTalent window decal



The Alpha Nissan GT-R 90mm Cast Wide mouth Downpipes are the best performing and most durable on the market. During testing our shop GT-R with Alpha upgraded turbos saw gains across the power band of 100 wheel horsepower and over 130 ft lbs of torque with this simple bolt-on!  Turbo spool-up was also improved by almost 400rpm. Our downpipes perform better and are not prone to cracking like the alternatives offered by the competition.  By casting these downpipes in robust 304 Stainless Steel we were not limited by the design restraints of hand fabricated construction.  The AMS engineering team utilized Solidworks to blueprint the inlet and outlets with smoother features and geometry to optimize exhaust flow.

They also provided thick flanges to prevent exhaust leaks and utilize the factory mounting hardware for OEM like fitment. Most other systems implement 76mm (3”) downpipes that can cause unnecessary back pressure. By using a larger 90mm (3.5”) primary pipe we were able to optimize exhaust gas flow, freeing up horsepower while improving spool time and throttle response.The Alpha Nissan GT-R 90mm Wide mouth Downpipes will easily support any future modifications.  Combined with unrivaled fit, finish, durability and performance you can enjoy them for the life of the car.


  • Two 90mm Alpha Cast downpipes
  • Downpipe bracket hardware


  • Cast Downpipes with NO CATS (set of two)
  • Big horsepower increases throughout the powerband
  • Improved turbo spool and throttle response
  • Cast construction offers added performance and reliability over the competition
  • Pronounced, throaty exhaust note under wide open throttle yet is subdued at idle and while cruising
  • Large 90mm (3.5”) primary section for optimal exhaust flow
  • Stock like fitment with no chassis clearance issues
  • Bolts up to the stock mid-pipe or most  aftermarket systems
  • Precision TIG welded with unrivaled fit and finish
  • 100% 304 stainless steel

Vehicle Fitment:

  • 2009 Nissan R35 GT-R
  • 2010 Nissan R35 GT-R
  • 2011 Nissan R35 GT-R
  • 2012 Nissan R35 GT-R
  • 2013 Nissan R35 GT-R
  • 2014 Nissan R35 GT-R
  • 2015 Nissan R35 GT-R
  • 2016 Nissan R35 GT-R
  • 2017 Nissan R35 GT-R
  • 2018 Nissan R35 GT-R


Images are for representation purpose only and may differ depending on application.