Product Description
Evolution Racewerks 4" Catless Downpipe - Alfa Romeo 2.0L Giulia / Stelvio - AR-EXH001
Introducing our new Competition Series 4" Downpipes for your 2.0L Engine 2016+ Giulia (952) and 2017+ Stelvio (949)
Key Features:
- Fitment for the 2016+ Giulia (952) 2.0L
- Fitment for the 2017+ Stelvio (949) 2.0L
- 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 Competition Series 4" Catless Downpipe, more power is unleashed! You will feel the difference instantly. While higher peak horsepower and torque gains are awesome, one of the best aspects of the downpipe is that the gains are not just peak gains. Horsepower and Torque come on sooner. Turbo lag is reduced with power coming on faster. Gains are throughout the powerband. Your car will feel like a totally different beast, as if it had woken from it's sleep!
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Brush Finish |
Ceramic Thermal Coated Black Finish |
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).
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CNC Machined Billet Stainless Steel V-band Flange |
Cast Stainless Steel Inlet |
Our downpipes are designed to fit perfectly with either the factory exhaust system or your aftermarket exhaust system. There are no compatibility issues whatsover. The downpipes will come by default in Brushed Finish. We also offer a Polished and Ceramic Thermal Coated Black 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 absortion 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 high, resulting in lower backpressure. The ceramic coating also adds additonal 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).
