Street. Track. Everything between.
Your garage Find parts for your vehicle Select year, make and model to narrow your search.

Injen 16-18 Ford Focus RS 3in Cat-Back Stainless Steel Exhaust w/ 4in Black Chrome Tips

SKU: INJSES9004

Exhaust Systems

INJ Catback Exhaust...

Injen 16-18 Ford Focus RS 3in Cat-Back Stainless Steel Exhaust w/ 4in Black Chrome Tips

SKU: INJSES9004

Exhaust Systems

INJ Catback Exhaust...

A$2,937.83
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.
View cart
We accept
American Express
Mastercard
Visa
PayPal Checkout
Direct Deposit
Afterpay
Apple Pay
Google Pay
Zip Pay

Description

The 2016-18 Focus RS is a machine the demands attention and respect wherever it's driven. The Injen Technology cat-back exhaust system compliments the Focus RS with impressive power, gorgeous looks, and a distinct sound that is unmatched. , , Unlike our competition that uses stepped down tubing, the Injen Technology system is a full 3"cat-back unit that is mandrel bent using only the best 304 stainless steel available. Another unique feature of the Injen cat-back exhaust system for the RS is that is utilizes individual resonators instead of a single traverse style muffler. Not only does this provide a unique sound, but also help to free up power throughout the RPM range. Injen Technology also decided to bypass the factory exhaust valve and provides a custom exhaust valve bypass module (P/N 2002) with every Injen Focus RS exhaust system. This allow you to enjoy that rich, crisp sound of your RS whenever you want. , , The rear of the Injen Technology RS cat-back system is a work of art and employs multiple slip fittings to allow an infinite amount of adjustment for a precise fit right out of the box. Dual 4"black chrome exhaust tips complete the exhaust and provide a finished look. , , Quality Construction; This Injen Technology exhaust system is constructed from 3"mandrel-bent 304 stainless steel tubing for maximum flow and long service life. From there, every aspect of the system is hand TIG-welded by our experts in our Pomona, California headquarters. , ,

Product Overview

The 2016-18 Focus RS is a machine the demands attention and respect wherever it's driven. The Injen Technology cat-back exhaust system compliments the Focus RS with impressive power, gorgeous looks, and a distinct sound that is unmatched. , , Unlike our competition that uses stepped down tubing, the Injen Technology system is a full 3"cat-back unit that is mandrel bent using only the best 304 stainless steel available. Another unique feature of the Injen cat-back exhaust system for the RS is that is utilizes individual resonators instead of a single traverse style muffler. Not only does this provide a unique sound, but also help to free up power throughout the RPM range. Injen Technology also decided to bypass the factory exhaust valve and provides a custom exhaust valve bypass module (P/N 2002) with every Injen Focus RS exhaust system. This allow you to enjoy that rich, crisp sound of your RS whenever you want. , , The rear of the Injen Technology RS cat-back system is a work of art and employs multiple slip fittings to allow an infinite amount of adjustment for a precise fit right out of the box. Dual 4"black chrome exhaust tips complete the exhaust and provide a finished look. , , Quality Construction; This Injen Technology exhaust system is constructed from 3"mandrel-bent 304 stainless steel tubing for maximum flow and long service life. From there, every aspect of the system is hand TIG-welded by our experts in our Pomona, California headquarters. , ,


Features and Benefits

  • CARB Exempt- NO
  • Injen's Gen2 Axle Back design for the Focus RS
  • Unique and Fully Adjustable design for perfect fit and alignment
  • Dyno Proven gains of up to 16 hp and 14 lb-ft. of torque
  • Full 76MM piping made from premium 304 SS Mandrel-Bent Tubing
  • Features dual Injen Resonators to deliver a clean, crisp, distinctively Injen sound
  • Beautiful dual 4.5"black chrome exhaust tips
  • Stainless Steel Investment Cast Flange for a Fast and Easy Install
  • Hand Crafted and TIG Welded to Perfection for Strength and Durability
  • Premium Stainless Steel Hardware and Hangers for a simple install
  • No Cutting or Welding Required
  • If you're looking to improve sound, power, and looks then this is the system for you!
  • Designed and Manufactured in Pomona, CA

Product Details

Catalytic Converter Quantity:0
Compatible Throttle Controller:PT0013B
Description:Cat-Back Exhaust System
Exhaust System Connection:Flanged and Clamp
Exhaust Type:Cat-Back
Exit Position:Split Rear
Finish:Polished
Grade Type:Performance
Hangers Included:Yes
Hardware Included:Yes
Inlet Inside Diameter:3.000 in.
Material:304 Stainless Steel
Muffler Body Diameter:4.5
Muffler Body Length:12
Muffler Body Material:304 Stainless Steel
Muffler Body Shape:Round
Muffler Flanged Inlet:No
Muffler Flanged Outlet:No
Muffler Let Size:3
Muffler Outlet Quantity:1
Muffler Outlet Size:3
Muffler Quantity:1
Part Number:injSES9004
Pipe Material:304 Stainless Steel
Primary Pipe OD:3
Prop 65 (C, R or CR):CR
Prop 65 - Short Label:prop65_warning.jpg
Prop 65 Yes/No:Yes
Secondary Pipe OD:3
Stepped Pipe Diameter:No
Tail Pipe Diameter:3.000 in.
Tail Pipe Material:Black Chrome
Tail Pipe Outlet Outside Diameter:4.5
Tail Pipe Quantity:2
Tip Diameter:4.000 in.
Title:Injen Performance Exhaust System
Tubing Diameter:3.000 in.
WARNING CA Proposition 65 Message:This product can expose you to chemicals including Chromium; Nickel and Cobalt; which are known to the State of California to cause cancer.
WARNING CA Proposition 65:Yes
Y-Pipe Included:Yes

Part Type

Exhaust System Kit

Data: v4.2 - Upd: 2026-10-13 23:10:16

Features

  • Beautiful dual 4.5"black chrome exhaust tips
  • CARB Exempt- NO
  • Designed and Manufactured in Pomona, CA
  • Dyno Proven gains of up to 16 hp and 14 lb-ft. of torque
  • Features dual Injen Resonators to deliver a clean, crisp, distinctively Injen sound
  • Full 76MM piping made from premium 304 SS Mandrel-Bent Tubing
  • Hand Crafted and TIG Welded to Perfection for Strength and Durability
  • If you're looking to improve sound, power, and looks then this is the system for you!
  • Injen's Gen2 Axle Back design for the Focus RS
  • No Cutting or Welding Required
  • Premium Stainless Steel Hardware and Hangers for a simple install
  • Stainless Steel Investment Cast Flange for a Fast and Easy Install
  • Unique and Fully Adjustable design for perfect fit and alignment

Specifications

Product Attributes - Brand
Injen
Product Attributes - Manufacturer's Part Number
SES9004
Product Attributes - Part Type
Exhaust Systems
Product Attributes - Product Line
Injen Super SES Stainless Exhaust Systems
Product Attributes - UPC
843115027247
Product Attributes - System Material
304 stainless steel
Product Attributes - System Style
Cat-back
Product Attributes - Exhaust Type
Single in/Dual out
Product Attributes - Exit Location
Split rear
Product Attributes - System Finish
Polished
Product Attributes - Catalytic Converter(s) Included
No
Product Attributes - Intermediate Pipe Diameter (in.)
3.00 in.
Product Attributes - Muffler Included
No
Product Attributes - Hardware Included
Yes
Product Attributes - Inlet Quantity
1
Product Attributes - Tailpipe Diameter (in.)
3.00 in.
Product Attributes - Tip Included
Yes
Product Attributes - Tip Outlet Size (in.)
4.50
Product Attributes - Tip Quantity
2
Product Attributes - Tip Shape
Round
Product Attributes - Tip Cut
Slant
Product Attributes - Tip Edge Style
Rolled edge, single-wall
Product Attributes - Tip Material
304 stainless steel
Product Attributes - Tip Color
Black chrome
Product Attributes - Remanufactured
No
Product Attributes - Quantity
Sold as a kit.
Product Attributes - Special Attention
It is illegal to install parts or components that bypass, defeat, or render inoperative the manufacturers’ technology and design necessary to reduce vehicle emissions to meet state and federal Clean Air Act standards.

Reference Information

Brand Name/s Injen
StreetFX SKU injSES9004
SFX Item ID 4243180
Supplier Item Code 4243180
Manufacturer SKU SES9004
Manufacturer UPC 843115027247
Alternative References 3in, 4in

Compatibility

Loading compatibility information...

Keep shopping

More from Injen