Exhaust› Mufflers and Resonators

Subaru

STI Performance Muffler

$1,495.00

SKU: ST44300V2000

Out of Stock
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Subaru ST44300V2000 is a performance muffler designed for the WRX S4 VB. This muffler features a buffed, all-stainless steel construction with slash-cut dual tailpipes (95mm x 2 each side). It offers a weight reduction of approximately 1.8kg compared to the standard muffler. The STI-tuned system provides a comfortable and refined sound, meeting Ministry of Land, Infrastructure, Transport and Tourism replacement muffler pre-certification standards.
Show original supplier description
The Subaru ST44300V2000 is a high-performance, all-stainless steel muffler featuring a buffed finish and dual slash-cut tailpipes (95mm diameter each side) for the WRX S4 VB. STI has meticulously tuned this exhaust system to provide a refined and pleasant sound profile that befits the WRX S4, while also achieving a weight reduction of approximately 1.8kg over the stock unit. This muffler is engineered with STI's unique tuning to ensure it operates safely and does not negatively impact the power unit or exhaust system. It is Ministry of Land, Infrastructure, Transport and Tourism replacement muffler pre-certification system approved, ensuring compliance with relevant regulations. Installation requires the separate purchase of two Subaru genuine gaskets (part number 44011SG010) and four self-locking nuts (part number 902330011). The included hanger cushions (5 pieces) should be used for mounting the muffler on both the left and right sides, with two cushions per side and one for the EPR. This performance muffler is specifically designed for the WRX S4 (VBH) and is compatible with various trim levels including GT-H, GT-H EX, STI Sport R, and STI Sport R EX across different model years (Applicable Model Symbols: B, C, D, and E). It is not compatible with the S210 (AWD/CVT) or WRX STI Sport ♯ (AWD/6MT) models in Applicable Model Symbol E. Please confirm your vehicle's "Applicable Model Symbol" and "Applied Model" designation to ensure proper fitment.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandSubaru
Part NumberST44300V2000
CategoryExhaust
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy