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With the rising popularity of the Toyota 86, Scion FR-S, and Subaru BRZ, owners are seeking more and more power-adder modifications to enhance this platform’s performance. Although bolt-on modifications can increase the FA20 engine’s performance, true power can only be realized with a forced-induction solution. No two forced-induction systems behave the same, and while some drivers may be looking for the most power they can get out of their 86/FR-S/BRZ, others may be seeking a street-friendly system that will complement their car. To ensure no questions are left unanswered, DSPORT Magazine collaborated with ENEOS to create the ultimate forced-induction guide…

Exhaust systems serve as one of the most important upgrade decisions you’ll make for your car. This hardware determines in part how your car will look, sound and perform. It makes a statement on what type of enthusiast you are, as car owners look for different benefits and characteristics. But how do you determine which exhaust best fits your needs? We decided to do the dirty work for you, as we selected 12 currently available exhaust systems for the 2015+ Subaru WRX and STI, and thoroughly evaluated their sound, appearance, build quality and performance on our D’Garage 2017 Subaru WRX…

COBB Tuning Subaru SS 3-inch Cat-Back Exhaust P/N – 515132 Cobb Tuning’s Subaru SS 3-inch Cat-Back Exhaust for the 2015+ WRX and STI features a TIG-welded 304 stainless-steel construction with one resonator and two mufflers. The exhaust employs a stamped flange at the down-pipe and laser-cut flanges at the Y-pipe, allowing for simple installation and precise fitment. This application is one of the few we tested that utilizes a resonator in the mid-pipe, helping bring sound levels down further without interrupting air flow. This configuration produced a very clean and pleasing exhaust note without being too loud, reaching only…

HKS Legamax Premium P/N – 31021-BF01 HKS’ Legamax Premium Exhaust System for the 2015+ Subaru WRX STI features a polished finish and TIG-welded construction with 304 stainless-steel. This exhaust provides a simple installation, excellent fitment and clearances, and high quality construction all around. The components bolt together via stamped stainless steel flanges, while the mid-pipe and two mufflers utilize all five available hangers to stay in place. The mid-pipe carries a unique design that utilizes an in-line silencer as well as a branched off Helmholtz chamber to reduce harsh sound frequencies without interrupting airflow. This adds up with the two…

Tomei Powered Expreme Ti Titanium Catback Exhaust P/N – 440018 The Tomei Powered Expreme Ti Titanium Catback Exhaust is unique in that it is the only titanium system and the only single-outlet system out of our test lineup. Given this configuration, the Expreme Ti exhaust features an 80mm pipe diameter with a 1mm-thick wall. The exhaust secures to the down pipe via an 8mm laser-cut flange, while the remaining components attach with slip-fit ends. This construction enables the extremely low weight of only 14 lbs. A resonator in the mid-pipe and a muffler on the end with a 115mm tip…

XForce Stainless Steel 3-inch Catback System with Varex Mufflers P/N – ES-SW26-VMK-CBS XForce’s Stainless Steel 3-inch Cat-Back System with Varex Mufflers is a very unique system, given its selling point of variable valve mufflers. A remote control or mobile app via Bluetooth enables users to control a set of valves built into the mufflers, adjusting sound levels on the fly. This feature, combined with the 304 stainless-steel construction adds up to a total weight of 52.4 lbs. The main piping routes measure a diameter of 76.2mm with 1.5mm wall thickness, while the Y-pipe splits into smaller 63.5mm diameter pipes. With…

TurboXS Catback Exhaust System P/N – WS15-CBE The TurboXS Catback Exhaust System features a TIG-welded, 304 stainless-steel construction. The pipe diameter spans 76.2mm with 1.5mm-thick walls, then reduces to 63.5mm after the Y-pipe split into the two mufflers. The pieces fit together with laser-cut 11.5mm flanges. This exhaust also includes a flex joint in the mid-pipe. At the rear-end, four large 101.6mm, slant-cut tips sport a burnt look for extra aesthetic points. The TurboXS exhaust sits on the heavier side, largely due to its bulkier mufflers, weighing in at 52.4 lbs. This also results in a very silent product, delivering…

Remark Cat Back Exhaust The Remark Cat Back Exhaust is made from TIG-welded, 304 stainless-steel. The 76.2mm piping has 1.5mm-thick walls, and narrows down to 63.4mm after the Y-pipe into the muffler inlets. The four pieces fasten together via 8.6mm cast flanges and a 10mm laser-cut flange at the down pipe end. With a weight of 34.5 lbs., this exhaust is the lightest stainless-steel system in the lineup. The two mufflers with their giant 106.5mm (changeable) tips made for a strong, bass-heavy tone. The exhaust found its peak volume at 3,000 RPM with 93 decibels. The Remark exhaust system increased…

SubiSpeed Quad Tip Catback Exhaust System P/N – quad-15wrxsti-ctbk SubiSpeed’s Quad Tip Catback Exhaust System features a TIG-welded, four-piece system made from 304 stainless steel. Weighing in at 35.4 lbs., it is one of the lighter stainless-steel options we tested. The pipe diameter spans 76.2mm before the Y-pipe, which then shrinks down to 63.5mm just before the two mufflers. This exhaust system bolts onto the down pipe with a 9.6mm laser-cut flange, followed by slip-fit connections between the mid-pipe, Y-pipe and mufflers. The four 90mm slanted tips extend a little further behind the car than the other exhaust systems, providing…

Mishimoto Subaru WRX/STI Cat-Back Exhaust, 2015+ P/N – MMEXH-WRX-15 Mishimoto’s Cat-Back Exhaust for the 2015+ WRX and STI comes in four pieces made from TIG-welded 304 stainless-steel. The 76.2mm piping has 1.5mm-thick walls and attaches together with a laser-cut flange at the down pipe end, a slip-fit opening with clamp at the mid-pipe to the Y-pipe, then V-band fittings from the Y-pipe to the muffler inlets. After the Y-pipe splits into the two muffler inlets, pipe diameter narrows from 76.2mm to 57.1mm on each side. Mishimoto’s exhaust system delivered an emphasized deep rumble sound from the EJ257, while keeping sound…

Magnaflow Competition Series Exhaust System P/N – 15472 The Magnaflow Competition Series Exhaust System for the WRX and STI features a TIG-welded 409 stainless-steel construction with 76.2mm-diameter piping. Aside from the stamped steel flange at the down pipe end, the exhaust system utilizes slip-fit ends with clamps to secure the four pieces in place. The 76.2mm diameter is maintained throughout the length of the exhaust, up to the two mufflers at the end. The Magnaflow exhaust system produced an aggressive, growling exhaust note, touching on 95 decibels at 5,000 RPM at its loudest. This exhaust employed four massive 101.6mm dual-wall,…

Injen Technology Catback Exhaust System P/N – SES1206TT Injen Technology’s Catback Exhaust system for the WRX and STI features 76.2mm-diameter piping made from 1.5mm-thick 304 stainless-steel. The four pieces join together by way of cast flanges, 14mm thick at the down pipe and mid-pipe attachment points, and 11.5mm thick where the Y-pipe meets with the muffler inlets. The Y-pipe splits into smaller, 60mm-diameter piping that leads to each muffler. The Injen Technology exhaust was among the loudest and most bass-heavy. Although the exhaust notes were favored by many of the DSPORT staff, sound levels matched the legal limit of 95…

GrimmSpeed Catback Exhaust System – Un-Resonated GrimmSpeed’s Catback Exhaust System – Un-Resonated for the WRX and STI consists of TIG-welded, 304 stainless-steel in four pieces. This model is unique in that it is designed to work with 2011-2014 and 2015+ models with its dual hangers, and it includes polyurethane mounting hangers to replace the original rubber ones. It utilizes 76.2mm diameter piping with 1.6mm-thick walls, mated together with 13mm laser-cut flanges. After the split in the Y-pipe, pipe diameters narrow down to 63.5mm. This exhaust also weighed among the heavier systems, totaling at 52 lbs. Sound levels maxed out at…

Extreme Turbo Systems Cat Back Exhaust System (Burnt Tips) P/N – 2015-WRX-CB The Cat Back Exhaust System from Extreme Turbo Systems (ETS) is constructed from 304 stainless-steel in four pieces. This TIG-welded exhaust system utilizes 76.2mm piping with 1.5mm-thick walls, with a laser-cut flange at the down-pipe attachment point and V-bands to mate the Y-pipe and two mufflers. Its construction allows it to press the scales at only 39.6 lbs., making it relatively lightweight compared to the other exhaust systems. Sound levels peaked at 92 decibels at mid-range and high RPMs, with some drone heard from inside the car. However,…

I hate this! What the Hell? How is it doing that? This trio of phrases was also heard on our dyno starting back in March. The cause? Our Project Scion FR-S was not cooperating with what was supposed to be a simple intake system showcase. The reason? Big government! The factory Engine Control Unit (ECU) in the Scion FR-S is now in total control of performance. Ignoring the driver’s input, the ECU ultimately determines the actual amount of throttle, ignition and fuel delivery it deems appropriate. It’s the epitome of Big Government and it’s becoming common on nearly all-new vehicles.…

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