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27WON

27WON High Flow Catted Downpipe | 16-21 Civic 1.5T, Si

27WON High Flow Catted Downpipe | 16-21 Civic 1.5T, Si

Regular price $642.71 USD
Regular price $642.71 USD Sale price $642.71 USD
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Unity Performance is the exclusive Canadian Dealer for all 27WON Performance Products in Canada! US folks, please continue to purchase through 27WON directly.

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Fits:

  • 2016 - 2021 Honda Civic 1.5T (Coupe, Hatch, Sedan)
  • 2017 - 2020 Honda Civic Si (Coupe, Sedan)

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The free flowing downpipe provides 7whp gains from 3200rpm to 5400rpm with no tuning changes. The 27WON Street-Catted setup provides great power gains. Throw some custom tuning at it and the downpipe really starts to shine.


Designed to work with all the OEM heat shields the 27WON down-pipe works best when paired with the benefits of the  larger and more free flowing front-pipe. Purchase them together and save over $100.

downpipe-laying-next-to-frontpipe-for-honda-crv-5th-gen

The free flowing downpipe provides 7 wHP gains from 3200rpm to 5400rpm with no tuning changes. The 27WON Street-Catted setup provides great power gains. Throw some custom tuning at it and the downpipe really starts to shine.

  • OEM downpipe = green graph
  • 27WON Street-Catted downpipe = red graph

dyno-graph-for-27won-downpipe-for-civic

The inlet and outlet of the 27WON Performance downpipe are CAD designed for optimal flow, durability, and fitment. The market leading 3.125” downpipe inlet creates a large volume for the hot exhaust gases to escape, providing increased turbocharger efficiency and response.

cad-drawing-of-w1-turbo-and-race-downpipe-for-l15

Inlet and outlet flanges are manufactured from investment cast T304 stainless steel. Stainless steel piping and brackets are precision TIG welded for a long lasting and durable performance downpipe.

80mm-cast-bellmouth

Precision TIG welding is utilized for the center section and the T304 SS heat shield brackets. The heat shield brackets are laser cut and formed with a multi-sided "foot" for a superior connection and durability.

super-clean-welds-on-performance-downpipe

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Customer Reviews

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K
K.C.
Full Turbo Back

I have bought the downpipe. front pipe and frontpipe back, so you will find this exact review on all 3 of the 27won products for the 1.5T Hatchback.

I LOVE this exhaust, its a bit louder than I expected, but nothing I'd complain about, but the tone is so clear, no rasp, ONLY drone I get is at ~3500 rpm. which is above the cruising speed RPM at speed and it only last for like, 200-300 RPM after than it clears out. My girlfriend who really ISN'T a fan of exhaust on cars, didn't seem to complain, or at least, didn't bother her enough for her to voice it out

The construction of the exhaust piping were REALLY good, welds were great and material was solid. My mechanic even voiced that this exhaust was the best exhaust he's ever fitted on a car as everything came togueter insanely well with no effort.

While the price might be a bit of a punch in the gut initially, I would definitively recommend it!

the ONLY thing I will advise is if you are lowered, given the pipe's increased size, the exhaust flange's hang kind of low, we're talking nearly as low as my tires and I've already scraped it going into my driveway while sporting Eibach Sportlines, which is about ~1.5 inches of drop.

The picture was taken from my friend who spotted my car and if you look at it you can see the flange