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Twisted Steel Down-Pipe; Street Series

Honda Civic Si 12-15 I4-2.4L
Part Number: 48-36602-HC
$739.63

MSRP: $901.99

Details:

  • This system utilizes a 400 CPSI (cell per square inch) catalytic converter for maximum flow
  • A unique 2-3/4" to 2-1/2" stepped design is used to increase exhaust velocity
  • Constructed of durable mandrel bent, brushed 304 stainless steel tubing
  • 100% hand TIG-Welded by certified craftsmen for race proven strength and durability
  • Incorporates a heavy duty 6" flex tube for added strength and durability
  • Includes an O2 sensor extension harness and a lower flange gasket for a hassle-free installation

Testing:
In testing, this down-pipe produced a max gain of +8 horsepower and +7ft. lbs. of torque verified by our in house dyno (tested on 2015 Honda Civic Si L4-2.4L)

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Overview

aFe power introduces an all new Twisted Steel "Street" down-pipe for the 2012-2015 Honda Civic Si with L4-2.4L VTEC engine. This down-pipe is designed using a 400 cpsi catalytic converter and mandrel-bent, 304 stainless steel tubing for optimum flow resulting in added horsepower and torque. In house testing produced a max gain of +8 horsepower and +7ft. lbs. of torque verified by our in house dyno. This down-pipe is 100% hand TIG-welded and uses a 2-3/4" into 2-1/2" stepped design that increases exhaust velocity and eliminates low pressure drops which helps to scavenge the exhaust for increased power. This kit also includes a heavy duty 4" flex tube with an internal interlock liner for added strength and durability.

Catalytic Converter:
This system utilizes a 400 CPSI (cell per square inch) catalytic converter for maximum flow.

2-3/4" to 2-1/2" Stepped Design:
A unique 2-3/4" to 2-1/2" stepped design, is used to increase exhaust velocity and increase usable torque. This means more aggressive throttle response and increased passing power.

6" Interlock Flex Pipe:
This unique down-pipe uses a heavy duty 6" flex tube with an internal interlock liner for added strength and durability.

TIG-Welded:
100% TIG-Welded by certified craftsmen for race proven strength and durability. TIG-Welding provides the strongest welds reducing stress cracks.

Brushed 304 SS Construction:
This down-pipe is constructed of durable mandrel bent brushed 304 stainless steel tubing for maximum performance, corrosion resistance and strength eliminating cracking.

Hassle-Free Installation:
Includes an O2 sensor extension harness and a lower flange gasket for a hassle-free installation. This unit also comes with a 2-year warranty.

aFe down-pipes are engineered and manufactured in our Corona, California manufacturing facility.

Note: This is a "Race Only" product used solely for competition. It's use is limited to closed-course and open-course racing that is formally sanctioned by a recognized racing organization. Any other use including recreational off-road use could be in violation of local, state and federal laws.

Applications

Vehicle Applications

Year Make Model SubModel Engine Fuel
2012-2015Honda Civic Si (Coupe/Sedan) I4 2.4L Gas
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