4" Quad Tips Catback Exhaust System For 2015-2021 Subaru WRX STi 2.0L 2.5L Stainless Steel

SKU: XKV41053
Availability : In Stock Pre order Out of stock
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Description

Experience the perfect blend of quality engineering and exceptional value with these high-performance Exhaust System. Manufactured from durable T-304 stainless steel with precision CNC-machined flanges and TIG/MIG welded construction, they deliver superior durability and flow characteristics. Computerized mandrel bending technology ensures smooth exhaust airflow for improved scavenging and reduced back pressure.

Features:

  • Made of High Quality T-304 Stainless Steel with Computerized Mandrel-Bends for Strength and Durability
  • Cast flanges - optimum fitment and durability
  • Machine welded - Fantastic appearance and uniform strength
  • QUAD Straight cut Titanium colored Tips
  • Exhaust Tubing Material: Stainless Steel
  • Main Tubing Diameter: 3.15"
  • Tip Quantity: 4
  • Tip Material: Stainless Steel
  • Tip Outlet Diameter: 4"
  • Tip Style: Single Layer
  • Professional installation is highly recommended

Fitment:

  • For 2015+ WRX / STI  R400 Gemini Quad Tips Exhaust
VEHICLE NAME YEAR ENGINE
Subaru WRX 2015~2021 --|2.0L|2.5L
Subaru WRX STI 2015~2021 --|2.5L
Shipping & Return

SHIPPING & DELIVERY
Fast Processing & Reliable Transit

  • Processing: Orders are processed and shipped from the nearest available warehouse within 1 business day after payment.
  • Delivery: Estimated delivery time is approximately 3–4 business days after shipment.
  • Shipping - Free shipping on all orders within the contiguous 48 U.S. states.

RETURNS & EXCHANGES
30-Day Hassle-Free Policy

  • Return Window: We offer a 30-day return policy from the date of delivery.
  • Item Condition: Returned items should be unused, uninstalled, and in their original packaging when possible.
  • Return Process: To initiate a return or exchange, please contact our customer service team first to receive authorization and instructions.

WARRANTY
2-Year Limited Replacement Warranty

  • Duration: All products are backed by a 2-year limited warranty.
  • Coverage: This warranty covers manufacturing defects and product failures under normal use, and provides a replacement for qualified cases (repairs are not performed).

CUSTOMER SUPPORT
We’re Here to Help – Contact Us First

  • Priority Contact: For any order-related issues—including returns, warranty claims, or general inquiries—please contact us first before taking further action. We are committed to resolving your concern promptly.
  • Feedback Notice: If you are unsatisfied, we kindly ask that you allow us an opportunity to address the issue before leaving neutral or negative feedback.
  • Email Support: You can reach us at support@XKVracing.com.

Understanding a Cat-Back Exhaust System

A cat-back exhaust system replaces the exhaust components from the catalytic converter to the rear of the vehicle. This section of the exhaust is downstream of emissions-control devices and does not alter their function.

Because of its position, a cat-back system primarily affects how exhaust gases are routed after they exit the catalytic converter, as well as overall sound characteristics.

Exhaust Sound Characteristics

Cat-back exhaust systems are designed with sound control in mind. Muffler design, piping layout, and vehicle platform all influence how the exhaust sounds during different driving conditions.

Sound characteristics can vary by application, allowing drivers to choose setups that align with their preferences while maintaining reasonable cabin comfort.

What Drivers Commonly Notice

Changes in exhaust tone compared to the factory system

Smoother exhaust flow through the rear section of the system

Reduced restriction in the post-catalyst exhaust path

A different overall driving feel, without altering emissions components

When a Cat-Back System Is Typically Considered

Want to change exhaust sound characteristics

Are replacing or updating rear exhaust components

Prefer a bolt-on exhaust solution

Wish to avoid modifications to emissions-control systems

FAST SHIPPING

Ships within 1 business day after payment
3–4 business day delivery

Secure and reliable Checkout

Secure checkout with major payment options

LOCAL WAREHOUSE

Orders ship from U.S. warehouses when available

Easy Returns and Exchanges

30-day returns for eligible unused items

Parts Warranty

Warranty support for qualified manufacturing defects

Important Notice

Catback exhaust systems are designed to replace the rear exhaust section where compatible. They are not represented as street legal, emissions-compliant, or CARB-compliant unless explicitly stated. Buyers are responsible for verifying local regulations and vehicle configuration before purchase and installation.

Professional installation is recommended. Please verify vehicle fitment, rear exhaust layout, hanger position, flange connection, bumper clearance, and included components before installation.

Sound, cabin noise, exhaust tone, fitment, airflow, fuel economy, and performance results may vary depending on the vehicle, installation, and complete exhaust setup. No specific performance gains or sound results are guaranteed.

Catback Exhaust FAQs

What is a catback exhaust system? +
A catback exhaust system replaces the exhaust section located after the catalytic converter area on compatible vehicles. It typically includes rear exhaust piping, a muffler section, exhaust tips, or related connection components depending on the product design.
Does a catback exhaust remove emissions equipment? +
Catback systems are generally positioned downstream of the catalytic converter area where compatible, but buyers should always verify the vehicle layout, local regulations, and product design before installation. This product is not represented as emissions-compliant unless explicitly stated.
Will a catback exhaust make the car louder? +
A catback exhaust can change exhaust tone and may increase sound depending on muffler design, pipe diameter, engine, vehicle platform, and the rest of the exhaust system. Final sound level and cabin noise vary by setup.
Will a catback exhaust increase horsepower? +
Horsepower, torque, throttle response, fuel economy, and driving feel changes are not guaranteed. Results vary by vehicle condition, engine, exhaust layout, muffler design, installation quality, and supporting modifications.
Do I need tuning after installing a catback exhaust? +
Tuning is not typically required for many catback-only installations, but requirements can vary by vehicle, exhaust setup, and supporting modifications. Always verify your vehicle configuration and consult a qualified installer if unsure.
Are catback exhaust systems street legal? +
Street legality depends on vehicle application, sound limits, emissions rules, and local regulations. Catback products are not represented as street legal, emissions-compliant, or CARB-compliant unless explicitly stated. Buyers should verify applicable regulations before purchase and installation.
Are catback exhaust systems hard to install? +
Installation difficulty varies by vehicle. Rusted hardware, tight underbody clearance, hanger alignment, flange condition, bumper clearance, and previous exhaust modifications can increase installation difficulty. Professional installation is recommended.
What should I verify before buying a catback exhaust? +
Verify your year, make, model, engine, trim, rear exhaust layout, hanger position, flange or clamp connection, tip clearance, included hardware, and local sound or emissions regulations before purchase.