K-Tuned Stainess Downpipe (Header) 12-15' Civic Si

Applications: 2012-2015 Civic Si

-Fits both Coupe and Sedan
-Upgrading the rear engine mount to a HASPORT rear mount to limit movement is highly recommended
-Copper Sealers is needed for all unions except between the cast portion and the head
-Replacement studs are 40mm-1.55' and nuts are 3/8th -24, replacement hardware is available as a special request

The K-Tuned 9th Gen Downpipe completely replaces the factory cat section with a free flowing 3" downpipe. Made with a cast stainless steel housing, designed to offer a smooth transition from the head flange to the exiting 2-bolt exhaust flange. The T304 stainless 3" diameter pipe section is tig welded and bolts up to the housing, before heading downward perfectly past the factory subframe and sway bar.

Welded into the lower part of the downpipe is a high quality Turbo Flex section with interlocking inner liner to absorb the normal engine movement.
On the cast housing, there is two O2 sensor bungs, one for the primary O2 and a second for an accessory O2 sensor, an O2 plug is included in case the O2 bung is unused.

Includes the following:
O2 plug x 1
Serrated M8 nuts x 2
M8 bolt x 1
M8 washer for the housing to head connection x 1
Impotant note: Some of the original hardware will still need to be used to hold the housing in place.