AMS Evo X Widemouth Downpipe




We price match!

The AMS Performance Evo X Widemouth Downpipe is the most power producing and well designed downpipe on the market. Made of 304 cast stainless steel including the flex section and flanges for rock-solid durability.

Vehicle Fitment:
2008-2015 Evolution X
• Fits all LHD models (left hand drive)
• NOT COMPATIBLE WITH RHD models (right hand drive)

Shipping Times:
Ships from AMS in 1-10 days on average.

• Best flowing design available, completely replaces o2 housing and downpipe
• 100% cast Stainless Steel construction. No mild steel flanges or cheap tubing
• Stainless steel high quality flex section
• 15+ Wheel Horsepower gains over stock
• Bolts up to the factory catalytic converter
• Wideband bung and plug
• Includes ALL gaskets and necessary hardware
• Unrivaled fit and finish
AMS vs Competitor (PDF)

• 304 cast Stainless Steel
• 3” diameter at its smallest point
• 304 stainless steel flex section

More from AMS:
The turbine outlet on the stock EVO X turbo is a cast piece with a rather complex geometry. It hugs the back of the turbo pretty tightly and has a small diameter outlet, necking down to around 2.25” before it enters the actual downpipe. The discharge from the turbo’s internal wastegate is introduced right at the point where the exhaust flow exits the turbine and the entire gas flow is then forced to make a tight turn all in a small area.

This creates a lot of turbulence and if the exhaust gas volume is increased by running other power increasing mods, this juncture is an area where a lot of backpressure will be created. Due to the space constraints, it is real hard to design a low backpressure fabricated tubular part to fit in the area allowed that is actually better than stock.

Removing Restrictive Design Constraints Allows For Maximum Power
By making the turbine outlet section a casting, we were able to maximize the tight space allowed for your o2 housing and downpipe. By using three dimensions to make a higher volume, straighter path from the turbine housing to the downpipe itself we achieved the best exhaust flow and power increases without sacrifice. This downpipe provides more than enough flow for anything from stock to the biggest upgraded turbos available making it the last one you will ever have to buy!

Better Than OEM Quality, Durability And Fitment
Unlike the competition, our downpipe is completely made of 304 cast stainless steel, including the flex section and flanges, for rock-solid durability. No thin, cheap tubing that can crack over time from engine movement and give you headaches down the road. Precise fitment makes for ease of installation and we provide all of the gaskets and hardware needed. We even incorporated a bung for a wideband gauge with a plug included.

We are sorry, discounts and codes are not available for AMS Products.

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Customer Reviews

Based on 1 review
Jonathan Escalante (Rock Hill, SC, US)
Stout downpipe!

Five-star rating on the construction of this downpipe thank you AMS. And thank you guys for the five star customer service STM!

Cancer and Reproductive Harm