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Invidia 11-14 Subaru WRX / STI Sedan Gemini/R400 Single Layer - HS11STIGM4STFind parts that fit my vehicle
Item TL-603076
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Product Information
Description, Q&A
Description
Far more engineering goes into the design of an exhaust system than many realize. From a performance perspective, there is a fine balance between exhaust back pressure and exhaust gas velocity. Too large a diameter pipe, and low down power and torque is sacrificed (particularly on naturally aspirated cars), too small a diameter or added restrictions and bottlenecks in the system, and the engine is unable to push gases out of the combustion chamber efficiently, reducing power and torque. There are many other technical aspects such as 'scavenging effect' which are beyond the scope of this document.
It's not as simple as just strap on a drain pipe and gains for days. A 'quality' exhaust system maximizes performance gains by design.
but the point is
Invidia HS11STIGM4ST
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
4.7
Reviews of Invidia Exhaust Products (6)
Reviews of Invidia Exhaust products have an average rating of 4.7 out of 5
Jun 13, 2018
Review shared from Invidia 02-07 WRX/STi 76mm Q300 Stainless Steel Cat-back Exhaust - HS02SW1G3S
2006 -
Q300
Replaced my 06 sti stock exhaust with this - a deeper rumble and lots of head turns!
Sep 20, 2013
Review shared from Invidia 11+ STI/WRX Sedan Only 76mm Q300 Titanium Tip Cat-back - HS11STIG3T
2013 -
INVIDIA Q300 W/ TI TIPS
Great product and best looking exhaust imo
Aug 29, 2017
Review shared from Invidia 15+ Subaru WRX/STI 4dr N1 Twin Outlet Single Layer - HS15STIGTT
2016 -
Good not Great
Well I got exactly what I ordered, it was easy to install, It looked great and everything fit as it should. Only thing I was disappointed about was the sound. Everything I saw on reviews and YouTube said it had a loud aggressive sound to it. Yes the sound has a nice deep rumble to it but it is by no means loud. I am going to buy a catless downpipe next to increase the flow, HP and sound. Hopefully that makes a bigger difference than this N1 alone.
Aug 29, 2017
Review shared from Invidia 15+ Subaru WRX/STI 4dr N1 Twin Outlet Single Layer - HS15STIGTT
2016 -
Good not Great
Well I got exactly what I ordered, it was easy to install, It looked great and everything fit as it should. Only thing I was disappointed about was the sound. Everything I saw on reviews and YouTube said it had a loud aggressive sound to it. Yes the sound has a nice deep rumble to it but it is by no means loud. I am going to buy a catless downpipe next to increase the flow, HP and sound. Hopefully that makes a bigger difference than this N1 alone.
May 29, 2017
Review shared from Invidia 08-11 STi Hatch / 11 WRX Hatch Dual N1 - HS08STIGTT
2010 -
Awesome system.
Welds are beautiful. System is a lot lighter than what you can imagine. Even with resonator is loud, but I knew that.
Aug 18, 2013
Review shared from Invidia 08-09 WRX Sedan Q300 Dual Stainless Steel Tip Cat-back - HS08SW4GT3
outstanding
Love love love my new exhaust system...the sound is fantastic
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