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Borla 04-07 STi XR-1 Cat-Back Exhaust

SKU: BOR140075

Exhaust Systems

BOR Cat Back S-Type...

Borla 04-07 STi XR-1 Cat-Back Exhaust

SKU: BOR140075

Exhaust Systems

BOR Cat Back S-Type...

A$2,017.53
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.

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Description

ExhstSysKt

The BORLA® sound of power. Its been described as asonic shot of adrenaline. An intoxicating concert ofsteel, gears and combustion that echoes from thespeedways, deserts and highways of the world.The sound of more victory laps than any otherbrand, the BORLA® exhaust note has become the quintessentioal soundtrack of high-performance motoring. And like all good automotive designs there is function behing the form. As any driving enthusiast knows, the sound of an exhaust provides more than just ear candy. Its a communications conduit between car and driver. A link between human and machine. The exhaust sound provides accoustic feedback of engine rpm to aid the driver in critical decisions such as gear selection or throttle input in rev-match shifting. At BORLA®, we understand this concept better than any exhaust manufacturer. Combining patented technology with computer modeling, extensive prototyping and advanced sound analysis tools. BORLA® engineers spend countless hours tuning exhaust systems to best reflect the personality and performance of vehicle applications. The result is an enhanced driving experience. With unrivaled clarity, the BORLA® exhaust note can help a driver stay within the powerband through a difficult section, using the exciting sensory feedback of sound. With unrivaled clarity the Borla exhaust note can help a driver stay within the powerband through a difficult section, using the exciting sensry feedback of sound.

Additional Information

S-Type Cat-Back(tm) Exhaust System 2002-2007 Subaru Impreza WRX 2.0L/ 2.5L Turbo 4 Cyl.. Auto./ Manual Trans. AWD 4 Door/ Wagon/ 2004-2007 Subaru Impreza WRX STI 2.5L Turbo 4 Cyl.. Auto./ Man. Trans. AWD 4 Door Sedan/ Hatchback.

Application Summary

Automatic/ Manual Transmission All Wheel Drive 4 Door Sedan/ Hatchback.

Part Type

Exhaust System Kit

Product Overview

Part# 140075 is the more Aggressive "S-Type" Cat-Back(tm). The mellow "Touring" Cat-Back(tm) exhaust is part# 140053 BORLA(r) Performance once again leads the industry with a high flow performance exhaust for the hot Subaru WRX and WRX STI. This Cat-Back(tm) system, BORLA(r) #140075, is custom designed by BORLA(r) engineers for the 2.5L turbocharged 4-cylinder engine with automatic and manual transmissions. Winning on racetracks around the world has given BORLA(r) a leg up on the competition with trickle down technology from the world's fastest cars. The unique design is a direct bolt-on fit that meets all emission requirements. The system has shown significant flow and performance improvements by virtue of BORLA(r) XR-1(r) patented technology utilizing 3" tubing that exits with a super looking BORLA(r) logo embossed 4"angle cut, rolled edge, single round polished T-304 stainless steel tip. More flow means more power, and if you tune this turbocharged super import, that flow will simply allow even more power. When you get a close look inside this muffler, you can see the patented BORLA(r) XR-1(r) multi cores -- that look says total performance. Increased fuel mileage is an added benefit. And, one more thing, it has a great sound, too, but then you've come to expect that from BORLA(r). Add a BORLA(r) header (#17217) for even more performance. BORLA(r) Performance Industries, the original pioneers of high quality T-304 austenitic stainless steel (superior to T-409 or aluminized steel) free flow exhaust utilizes its patented award and race winning technology to deliver quality, sound, performance gains and enhanced fuel economy all with an easy bolt-on installation. All BORLA(r) street products carry the famous BORLA(r) written million-mile warranty.

Additional Application Notes
• 3 in Tubing; Incl. Connecting Pipes/Mufflers/Hardware/4.5 in. Round x 7.75 in. Long Single Rolled Angle-Cut Phantom Tip; Single Left Rear Exit;

These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.

Data: v4.2 - Upd: 2026-11-09 01:07:22

Features

Important Notice relating to US Domestic Market Trucks & Pickups

Many US-market trucks and pickups are available in multiple cab and bed-length configurations (e.g., Single Cab, Extended Cab, Double/Crew Cab, CrewMax, 5.5ft/6.5ft/8ft beds, etc.). Exhaust system fitment can vary between these chassis versions.

Where available, we list all compatible vehicles, cab types, and bed lengths in the product description. However, depending on your exact configuration, some systems may require optional extension/mid-pipes or minor modification for correct fitment.

Because of these variations, please carefully check your cab configuration and bed length before purchasing. If you are unsure, or if your vehicle has been modified, please reach out to a StreetFX agent.

(keyword: cat-back)

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Product Details

Construction:All Welded
Description:S-Type; Cat-Backâ„¢ System
Exhaust Type:Cat-Back(tm) System
Exit Position:Rear
Exit Style:Single Left Rear Exit
Grade Type:Performance
Material:T-304 Stainless Steel
Muffler Type:Straight-Through
Off Road Use Only:No
Part Number:bor140075
System Type:Cat Back
Tail Pipe Diameter:3.000 in.
Tail Pipe Material:Stainless Steel
Tip / Outlet Finish:Polished T-304 Stainless Steel
Tip Diameter:4.500 in.
Tip Size:4.5in
Title Extended:WRX/ WRX STI 2002-2007 Cat-Back(tm) Exhaust System S-Type Part # 140075
Title:WRX/ WRX STI 2002-2007 Cat-Back(tm) Exhaust System S-Type
Tubing Diameter:3.000 in.

Product Downloads

# Document Type Download
1. Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Data: v2 - Desc: v4.2 - Upd: 2026-11-07 17:21:28

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Borla, Borla Exhaust
StreetFX SKU bor140075
SFX Item ID 4224654
Accounting SKU bor-140075
Manufacturer SKU 140075
Manufacturer UPC 808422400756
Alternative References 140075, BOR-140075

Exhaust System, S-Type, Cat-Back, Single, Stainless Steel, Natural, Rear Exit, Subaru, 2.5L, Kit

Borla S-type cat-back exhaust systems feature patented straight-through and multi-core technology to unleash hidden horsepower and produce a more aggressive sound and higher flow. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive Borla Sound of Power respected by motoring enthusiasts everywhere.

Each system is built from premium 300-Series austenitic stainless steel, superior to T-400 Series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow and power, and precision computer-controlled CNC manufacturing ensures an accurate fit. It's just what you'd expect from the world's most experienced (and most winning) exhaust brand.

Product Attributes
UPC808422400756
BrandBorla
Tip CutSlant
QuantitySold as a kit.
Part TypeExhaust Systems
Tip ShapeRound
Tip FinishPolished
Exhaust TypeSingle
Product LineBorla S-Type Cat-Back Exhaust Systems
System StyleCat-back
Tip IncludedYes
Tip Material304 stainless steel
Tip Quantity1
Exit LocationRear
Muffler StyleTurbo
System FinishNatural
Inlet Quantity1
Muffler FinishNatural
Tip Edge StyleRolled edge
System Material304 stainless steel
Muffler IncludedYes
Muffler Material304 stainless steel
Muffler QuantityOne
Hardware IncludedYes
Special AttentionIt 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.
Muffler ConfigurationSingle inlet/Single outlet
Tip Outlet Size (in.)4.50
Manufacturer's Part Number140075
Catalytic Converter(s) IncludedNo
Intermediate Pipe Diameter (in.)3.00 in.

Compatibility

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