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Description
STI SPORT MUFFLER B4 For LEGACY B4 (BL) ST4430021001Brand STI Product SPORT MUFFLER B4 Product Number ST4430021001 Description This product provides dual left and right tail ends, without changing the muffling format of the standard multi stage expanding muffler. It is tuned to emphasize the dry sound of boxer engines. The outer shell of the main muffler is made from stainless steel. The STI logo is stamped on the top of the tail pipes. Compatible Vehicle LEGACY B4 (BL) Compatible Models Model
| Brand | STI |
| Product | SPORT MUFFLER B4 |
| Product Number | ST4430021001 |
| Description | This product provides dual left and right tail ends, without changing the muffling format of the standard multi-stage expanding muffler. It is tuned to emphasize the dry sound of boxer engines. The outer shell of the main muffler is made from stainless steel. The STI logo is stamped on the top of the tail pipes. |
| Compatible Vehicle | LEGACY B4 (BL) |
| Compatible Models |
Model adaptation symbol: A 2003-year May-2004 04 May 2.0i (AWD / 4AT) - 2.0i (AWD / 4AT) - 2.0R (AWD / 5MT) - 2.0R (AWD / 4AT) - 2.0GT (AWD / 5MT) ___ 2.0GT (AWD / 5AT) ___ 2.0GTspec.B (AWD / 5MT) ___ 2.0GTspec.B (AWD / 5AT) ___ 3.0R (AWD / 5AT) - 3.0R (AWD / 5AT) - model adaptation symbol : B 2004 year 05 January to May 2005 2.0i (AWD / 4AT) - 2.0i (AWD / 4AT) - 2.0R (AWD / 5MT) - 2.0R (AWD / 5MT) - 2.0R (AWD / 4AT) - 2.0 R (AWD / 4AT) - 2.0GT (AWD / 5MT) ___ 2.0GT (AWD / 5MT) ___ 2.0GT (AWD / 5AT) ___ 2.0GT (AWD / 5AT) ___ 2.0GTspec.B (AWD / 5MT) ___ 2.0 GTspec.B (AWD / 5AT) ___ 3.0R (AWD / 5AT) - 3.0R (AWD / 5AT) - 3.0Rspec.B (AWD / 6MT) - model adaptation symbol: C 2005 Jun-2006 May 2.0i (AWD / 5MT) - 2.0i (AWD / 4AT) - 2.0i (AWD / 4AT) - 2.0R (AWD / 5MT) - 2.0R (AWD / 4AT) - 2.0R (AWD / 4AT) - 2.0R (AWD / 4AT) - 2.0GT (AWD / 5MT) ___ 2.0GT (AWD / 5AT) ___ 2.0GTspec.B (AWD / 5MT) ___ 2.0GTspec.B (AWD / 5AT) ___ BLITZEN 2006 (AWD / 5MT) - BLITZEN 2006 (AWD / 5AT) - 3.0R (AWD / 5AT) - 3.0R (AWD / 5AT) - 3.0 Rspec.B (AWD / 6MT) - 3.0Rspec.B (AWD / 5AT) - model adaptation symbol: D 04 May 2006 06 May and 2007 2.0i (AWD / 5MT) - 2.0i (AWD / 4AT) - 2.0R ( AWD / 5MT) - 2.0R (AWD / 4AT) - 2.0GT (AWD / 5MT) ___ 2.0GT (AWD / 5AT) ___ 2.0GTspec.B (AWD / 6MT) ___ 2.0GTspec.B (AWD / 5AT) ___ 3.0 R (AWD / 5AT) - 3.0Rspec.B (AWD / 6MT) - 3.0Rspec.B (AWD / 5AT) - model adaptation symbol: E 05 May 2007 - 2008 04 May 2.0i (AWD / 5MT) - 2.0i B -SPORT (AWD / 5MT) - 2.0i (AWD / 4AT) - 2.0i B-SPORT (AWD / 4AT) - 2.0i Brighton (AWD / 4AT) - 2.5i (AWD / 4AT) - 2.0Rspec.B (AWD / 5MT) - 2.0Rspec.B (AWD / 4AT) -. 2.0GT (AWD / 5MT) ___ 2.0GT (AWD / 5AT) ___ 2.0GT SI-CRUISE (AWD / 5AT) ___ 2.0GTspec B (AWD / 6MT) ___ 2.0GTspec.B (AWD / 5AT) ___ 3.0R (AWD / 5AT) - 3.0R SI-CRUISE (AWD / 5AT) - model adaptation symbol: F 2008 year May-2009 2.0i (AWD / 5MT) - 2.0i (AWD / 4AT) - 2.5i (AWD / 4AT ) - 2.5i SI-CRUISE (AWD / 4AT) - 2.0GT (AWD / 5MT) ___ 2.0GT (AWD / 5AT) ___ 2.0GT ES (AWD / 5AT) ___ 2.0GTspec.B (AWD / 6MT) ___ 2.0GTspec .B (AWD / 5AT) ___ 3.0R ES (AWD / 5AT) - S402 (AWD / 6MT) -
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| Remarks | * Since there is no clearance with the tail pipe, this product can not be installed together with Subaru genuine rear bumper skirt and exhaust finisher. * Vibrations and noise are transmitted more easily to the interior of the car due to the hard bushings. * For B4 turbo (2.0GT, 2.0GT Spec.B, 2.0GT SI CRUISE, 2.0GT EyeSight) * The explanation of this product is for Japanese specification. |
| Notes | Images are for illustration purpose only. Actual product may vary. |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 5
Size
Color: Navy Blue, Size: 3X-Large
love the shirt and they fit well for an overweight man. All the ones I got are consistent in size and you don't see that often.
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Reviewed in the United States on April 21, 2026
★★★★★ 5
Excellent style and quality for price
Color: Grey Blue, Size: Medium
Very nice quality and affordable price. Fabric is soft and smooth, very few wrinkles after washing and drying and easy to iron. Seems durable for machine washing and drying. Fits true to size.
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Reviewed in the United States on January 27, 2026
★★★★★ 4
... size runs small
Color: Army Green, Size: XX-Large
It's a great dress shirt ... (size runs small, so order one sze up) ....wore to a wedding and received more than a dozen compliments on this shirt...also looks good tucked or untucked, highly recommend...👍🏼👍🏼
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Reviewed in the United States on April 3, 2026
★★★★★ 5
Great Quality
Color: White, Size: Large
This company is just the best not only there shirts but everything they sell is great quality and perfect fits each and every time and the deals are even better I highly recommend
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Reviewed in the United States on April 21, 2026
★★★★★ 5
Best dress shirt ever
Color: Denim Blue, Size: Large, Color: Denim Blue, Size: Large
The fit is perfect. I really like the trimming down the button line.
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Reviewed in the United States on April 20, 2026