SKU: 8018745037

Sports Series 4" Metallic High Flow Downpipe for the 2016+ Alfa Giulia / Stelvio 2.0L

Sale price$402.75 Regular price$447.50
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Description

Sports Series 4" Metallic High Flow Downpipe for the 2016+ Alfa Giulia / Stelvio 2.0LIntroducing our new Sports Series 4" High Flow Catted Downpipes for your 2. 0L Engine 2016+ Alfa Giulia (952) and 2017+ Alfa Stelvio (949) Key Features: Made in the USA! Manufactured in house. Fitment for the 2016+ Giulia (952) 2. 0L Fitment for the 2017+ Stelvio (949) 2. 0L High Flow 200 cell metallic catalytic converter used Higher Max Horsepower Power Curve Higher Intial Torque Curve. Torque curve hits faster, higher, and longer Better throttle

Introducing our new Sports Series 4" High Flow Catted Downpipes for your 2.0L Engine 2016+ Alfa Giulia (952) and 2017+ Alfa Stelvio (949)

Key Features:

  • Made in the USA!  Manufactured in house.
  • Fitment for the 2016+ Giulia (952) 2.0L
  • Fitment for the 2017+ Stelvio (949) 2.0L
  • High Flow 200 cell metallic catalytic converter used
  • Higher Max Horsepower Power Curve
  • Higher Intial Torque Curve.  Torque curve hits faster, higher, and longer
  • Better throttle response and faster turbo spool up times
  • Cast stainless steel inlet for smooth transition from turbocharger to downpipe.
  • Mandrel Bent 4" piping.  Smooth transition to the exhaust system
  • 100% Stainless Steel Construction
  • 100% TIG welded for better quality welds
  • High quality precision CNC machined flanges.
  • Brush Finish (standard) or optional Polish Finish
  • Available with high temperature Black Thermal Coating to reduce underhood temperatures
  • Optional - Additional O2 sensor bung for wideband O2 sensors (comes with pre-installed plug)
  • Optional EGT sensor bung for EGT gauges (comes with pre-installed plug)
  • Compatible with the factory or aftermarket exhaust systems
  • Track tested durability
  • Includes all hardware for complete installation
  • Limited Lifetime Warranty

Restrictions in the exhaust system robs horsepower and torque especially on turbocharged cars.  Thus, removing as much exhaust flow restrictions will increase horsepower and torque significantly.  The factory catalytic converter found in the factory downpipe is a big culprit of this and is a major exhaust flow restriction. The factory catalytic converter is made up of catalyst material formed into "honeycomb" weaves. Exhaust gas must pass through these tiny "honeycomb" weaves on their way to the exhaust system thus causing a major exhaust flow restriction. It also causes turbulence after the catalytic converter which causes the exhaust flow to slow down (which increases restriction). By replacing the factory downpipe/catalytic converter with our Sports Series 4" High Flow Metallic Catted Downpipe, more power is unleashed! 

The factory catalytic uses a 600 cell ceramic core. What the 600 cells means is that per every inch, there are 600 "cells" that the exhaust gas must pass through. We use a 200 cell metallic core. By having less cells per square inch, these individual "cells" are bigger in size thus allowing exhaust gas to pass through it more easily. Thus, the lower the cell count, the higher the flow. Higher flow = more power, faster turbo spool up (less turbocharger lag) and better throttle response. Bottom line, faster. The benefits of a metallic catalytic converter vs a ceramic like the factory is that it can take higher temperatures and is more durable (last longer). They are also lighter than their ceramic counterparts.

Our Competition Series Catless Downpipes is constructed out of 100% 304 grade stainless steel, even down to the included hardware. Utilizing mandrel bent tubing, each downpipe is 100% TIG welded by our in-house fabricators and built in the USA.  The factory wastegate outlet utilizes a V-Band flange which we have duplicated and CNC machined cut out of billet 304 stainless steel. Stainless Steel CNC machined O2 sensor and laser cut brackets are TIG welded using stainless steel rods. The O2 sensor is positioned at the factory location.

The factory turbocharger outlet has an iregular oval outlet as well as a very tight first turn.  Reducing backpressure right at the turbocharger outlet is very critical for reducing turbocharger lag and a faster spoil up of the turbocharger.  Due to the tight first bend, we felt we could not keep the correct shape to reduce restriction with regular tubing.  Even the factory downpipe utilizes a formed piece instead of tubing.  Thus, we decided to cast form stainless steel to produce the eact shape needed to maintain a smooth transition on the first turn.  While this would dramatically increase development costs, we followed our company motto, "Performance, no Compromise" to offer you a much superior performance product.

Since the outlet of the turbocharger is around 4", we utilize 4" stainless steel tubing which using long transitions to reduce the size to 3" to match up with our 3" Evolution Racewerks Mid Pipes (factory is 2.5").  These longer transitions allow the exhaust gas time to smoothly transition from the larger piping to the smaller. This also allows us to keep a true 3" size through to our Evolution Racewerks 3" Mid Pipes as the factory mid pipes are 2.5".  Also, since we utilize a larger 4" pipe right after the turbocharger, turbo backpressure is significantly reduced. This results in less exhaust turbulence and backpressure which again improves throttle response and increase turbocharger spool times (less turbocharger lag). 

Our downpipes are designed to fit perfectly with either the factory exhaust system or your aftermarket exhaust system. There are no compatibility issues whatsoever.  The downpipes will come by default in Brushed Finish.  We also offer a Polished Finish as an option.

OPTIONS

Ceramic Thermal Coating - The purpose of ceramic coating downpipes is to keep heat from the exhaust gases inside the downpipe from radiating out. This keeps underhood temperatures lower and less heat absorption by nearby parts/surfaces.  Another added benefit is that by keeping in heat (energy) in the exhaust gases inside the downpipe, exhaust flow velocities stay up, resulting in lower backpressure. The ceramic coating also adds additional corrosion resistance. We utilize the best ceramic coating possible. Our thermal coating can resist up to 2000F of heat. It is available in black only (all the other colors cannot withstand the high levels of heat).

Additional O2 Sensor Bung - An additional O2 sensor bung can be added so that you can easily add a wideband O2 sensor and gauges for you to monitor air/fuel ratios. The additional O2 sensor bung will come pre-installed with a plug so that you do not need to run the O2 sensor right away.  This is not required for a normal standard installation.

Optional EGT (Exhaust Gas Temperature) Bung - An additional 1/8" NPT bung can be added so that you can easily add a EGT sensor and gauge. The optional EGT sensor bung will come pre-installed with a plug so that you do not need to run the EGT sensor right away.  This is not required for a normal standard installation.

CAUTIONThis product is intended for OFF ROAD COMPETITION USE ONLY. Not legal for use on pollution controlled vehicles upon public road/highways. THIS PRODUCT IS FOR SALE FOR ALL 49 STATES EXCLUDING CALIFORNIA.  In addition to vehicle use verification, a Vehicle Compliance Waiver needs to be signed.

THIS ITEM IS NOT FOR SALE, INSTALLATION, OR USE ON LICENSED VEHILES IN THE STATE OF CALIFORNIA. 

The item is for sale for international customers without restriction.

Please contact us at [email protected] or call us at (626) 334-6609

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 8018745037

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4.3 ★★★★★
Based on 27 reviews
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Harrison Cole Youngren
Charlottesville, US
★★★★★ 5
Nice once put together.
Color: Black, Size: 88"- 4 Panel
I really enjoyed these ones. They got put up, putting them together was a two-man task and not very easy at all. They work really good. They're very heavy duty. You can hang things on them. I kick mine out of the way and they work like a charm!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 2, 2025
C
Verified Purchase
C.L.
Los Angeles, US
★★★★★ 5
Excellent privacy shade.
Color: Coal Black
This delivered on exactly what it promises. So happy with the quality for the value. The shades are a fabric, nylon like, that are attached with a pocket on one end and velcro that adheres around the bar on the other. This was incredibly easy and straightforward to put together. Every piece was clearly labeled, coordinated with the instruction sheet, and fit perfectly. Honestly, I wasn’t planning to leave a review but I was so impressed by how clearly labeled and well explained the instructions were that I felt compelled to note it. Especially for anyone who doesn’t like putting things together, or is used to subpar instructions, this is leagues above the rest. It’s such a simple build anyway, but after buying so many things that barely fit as they should, this stands out. It is lightweight and easy to move. Offers privacy when opened, then can be folded out of the way. It looks exactly as pictured. No complaints, it’s a solid item and worth the price.
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Reviewed in the United States on April 9, 2026
C
Verified Purchase
Courtney A.
Phoenix, US
★★★★★ 5
Decent quality for the price
Color: Grey
Decent quality for the price. Other privacy screens were extremely out of my budget, but this looks and works just fine- I just needed something simple to place behind my couch to hide some clutter. It took me about a half hour to assemble, but it was easy enough. It might be due to my carpeting, but I don't trust that the screen would be stable enough to stand freely without falling. Thankfully my plan all along was to wedge the screen between the couch and a box of clutter anyway, so for me it works as l'd planned!
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Reviewed in the United States on April 10, 2026
M
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Madi R.
Lake Worth, US
★★★★★ 4
Overpriced but effective.
Color: Cream
I happened to get lucky and get a warehouse deal at an additional 30% discount. Even at $25, it feels a little overpriced. But it was easy to assemble and serves its purpose. If you line the Velcro up exactly, the panels sag, if you stretch past even, but where it still grips, they look pretty ok. It is very light and does fold very compact for easy storage.
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Reviewed in the United States on April 3, 2026
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Verified Purchase
Sunny in AZ
Los Angeles, US
★★★★★ 5
Great price for a great product
Color: Coal Black
Excellent quality and great price to boot. Easy to assemble and folds up easily to be stored. We are using it as a privacy screen when we have company that needs to sleep on the couch and also to block off a hallway leading to a guest suite. It looks great and is as described in the ad
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Reviewed in the United States on December 16, 2025

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