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This is XForce's Varex valved cat-back exhaust system for the Subaru WRX STI, 2003 onwards. It replaces the exhaust from the catalytic converter rearward with mandrel-bent raw 409 stainless steel pipework, a centre hot dog resonator, a Varex oval rear muffler and twin 80mm tips. A remote control kit is included, and the Varex muffler switches between a quiet and an aggressive tone at the touch of a button.
The valve is built into the rear muffler and worked by the included remote, so the quiet setting for everyday driving and the aggressive one for the track are two states of the same exhaust. With the hot dog resonator sitting in the centre of the system, part of the silencing is handled mid-system rather than all of it at the tail. Mandrel-bent tubing holds its full internal diameter through each bend instead of narrowing at it, so the gas path keeps an even cross-section for the length of the system.
Features
- Varex oval rear muffler - quiet to aggressive tone at the touch of a button
- Remote control kit included
- Centre hot dog resonator
- Mandrel-bent tubing for exhaust flow
- Raw 409 stainless steel
- Twin 80mm tips
Fitment
Subaru WRX STI, 2003 onwards. Manual transmission vehicles only. Some vehicles fitted with a stand-alone catalytic converter also require the E4-SW05-C1 connecting pipe for a bolt-on fit to this cat-back system.
Does not fit: Automatic transmission cars - this system fits manual vehicles only.
Please note: A valved exhaust is loud with the valve open. Check your local noise regulations before using it that way on the road.
Let customers speak for us
Solid shipping ,good communication ,great product 5stars all the way
First let's preface I have tried three other tuners. Not bad mounting or name dropping as they all were solid tunes. But Daniel just has that magic touch when tuning the 1.6 platform.
The car has a buttery smooth power band making the car feel like a larger displacement six cylinder over a turbo charged car. Plenty of fun to be had at any speed or RPM range.
He will take the time to get you dialed in perfectly for your car. No canned tunes here folks. And if you are a EK1 user three tunes for the price of one simply can't be neat.
I received the Stage 2 tune. Here are my thoughts:
- The shifts are buttery smooth
- I love the auto shift @2000rpm when cruising around town; saves me an extra 2-3mpg overall
- Driving in traffic is a dream now, much better than stock. I don't even hear that annoying shifting fork anymore, lol
- Any and all DCT slips are gone
- The increase in torque limit! This opened up my N75 Stage 3 ECU tune; I can feel the difference. The last time I dynoed, I got 289 lb-ft of torque. But it feels much more substantial than that!
- The clamping force is unreal. I did a run from a dig, and it hooked and slammed through the gears all the way to 7k rpm in each gear. Amazing.
Conclusion: This TCU tune is a must-have. If you have an N75 ECU tune, it is an absolute game-changer! Especially with the Redline MT-LV fluid that I'm running. I can't wait to get my retune with water meth injection. Daniel and the rest of the N75 team are the best!
Works like suppose to be fast delivery after installation 5 minutes drive TPMS sensors lights off everything is normal like from factory 👍👍👍
![Hyundai Elantra N TPMS Sensor Set of 4 [OEM Hyundai MOBIS]](https://cdn.shopify.com/s/files/1/0276/1359/3623/files/359598029_246649464881156_6848003515050026659_n_70x70.jpg?v=1690929846)
Product was very easy to install and what a difference in shifting also n75 was super awesome to deal with will shop here again
After using the N75 tune for a couple of months, I can confidently say that it offers the best value for your money on the market. I've tried SXTH and LAP3 tunes before, but since switching to N75, I won't look back. With top-notch customer support, it ensures your car performs better, turning heads at every car meet.
Been running stage 2 off that bat and had some problems here and their regarding fueling. Daniel has been with me the whole way, answering questions and adjusting tunes while adding revisions whenever asked. He answers every question I ask even when they don’t relate to tuning.
Highly highly recommend N75!
Daniel's tuning and customer service makes this product a 10 out of 10. I'm new to tuning and he made the process a breeze. I literally laughed out loud when I first drove the car after installing the stage 2 tune. I still can't believe the difference.
Love the intake, fitment is superb, instal was easy and best of all n75’s customer support is stellar and way above average!
M45IL Kia Stinger GT 3.3TT Spark Plugs
Hands down best bov I’ve had, I got the part 5207 for trumpet sound and man. You won’t be disappointed. Shipping was fast & easy.
Looks great!
Fast shipping, easy to install, quality built.
Waiting for some more parts then dyno time!
Awesome
Perfect size and great location for the WMI port.
