STM GESi EPA Catted Downpipes for R35 GTR

The STM stainless steel R35 GTR downpipes are a direct replacement for the stock pipes and weigh 9 lbs less than stock. The STM Downpipes are USA made, tig welded and back-purged stainless steel utilizing GESi GEN2 EPA compliant catalytic converters rated to flow up to 850 HP.

Vehicle Fitment:
2009-2025 Nissan R35 GT-R

Features & Specs:
• 400 Cell GESi Gen 2 G-Sport EPA Converter
• Supports up to 850 HP
• Stock Downpipes weigh 23.8 (pair)
• STM Downpipes weigh 14.93 (pair)
• STM Downpipes saves 8.87 pounds overall
• Tig-Welded and Back-Purged
• Stainless Steel
• 3" Outlets

STM Products are Made in the USA!
Lifetime Warranty on STM Parts to the original purchaser against manufacturing defects.
* This does not include the natural life of the converter
* We ship worldwide - please check all your local laws before purchase

Purchase Includes:
(2) STM Catted Downpipes
(2) Remflex 3" Gaskets
(4) M10 x 35 Bolts
(2) M10 x 20 Bolts
(6) M10 Washers
(6) M10 Nuts

Also Available:
OEM Gaskets (14445JF01A/14445JF01B) are sold separately.

Shipping Times: 1-14 Days:
Hand crafted and welded in New York, please give our fabricators time to create your piece!

Updated Oct 2025:
Same design, but with more CNC parts made in-house at STM!

Previous Part Number:
STM-GTR-CDP