Thermal 06-11 Civic Si Coupe 3" Cat-Back Exhaust System
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Thermal R&D features a line of exhaust systems designed for Turbocharged vehicles. These systems are made of 3" mandrel bent stainless steel pipe and require some slight modifications to your high-flow catalytic converter. We include an extra 3" flange for an easy installation of the exhaust system. These systems are a true 3" and will not connect to a stock catalytic converter.
Full Stainless Steel
High Polished for Show Quality Looks
Hand Welded and Tested for Peak Performance
2006 Honda Civic Si Coupe 2007 Honda Civic Si Coupe 2008 Honda Civic Si Coupe 2009 Honda Civic Si Coupe 2010 Honda Civic Si Coupe 2011 Honda Civic Si Coupe
1 Reviews ★★★★★ ★★★★★
5.00/5.00 Stars out of 1 ReviewsWrite a Review
Kurt | February 26th, 2020
So this is my 2nd catback for my daily fg2 si. My first was the ktuned which was amazing but had 2 cons. It hung low and definitely was load and very droany in the cabin. Went with the thermal r & d as it was noted to be quieter than competing exhausts with 3 in diameter piping. This exhaust BY FAR surpasses the competition. Its definitely milder on cruise and growls on WOT. The fitment is SPOT ON and needs zero tweaking to fit acurately. No knocking or vibrating on the suspension like other 3 in cbes. The entire system tucks under the car nicely. Lastly, the tip is adjustable to slide back if you have an aftermarket bumper or after market lip. Overall 5 stars quality sound and fitment.