★★★★★ 5
Air intake
Style: Standard Air Filter
Good quality
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 28, 2026
B&C 21” 3400 Watt 8 Ohms Low Distortion Woofer w/ Neodymium magnet - 21SW115-8
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
B&C 21” 3400 Watt 8 Ohms Low Distortion Woofer w/ Neodymium magnet - 21SW115-8Overview Features 3400 W continuous program power capacity 116 mm (4. 5 in) split winding copper voice coil 30 1000 Hz response 97 dB sensitivity 60 mm peak to peak excursion before damage Neodymium magnet allows a very high force factor and linear excursion Double silicone spider with optimized compliance Ventilated voice coil gap for reduced power compression Aluminium demodulating ring for very low distortion Specifications Nominal Diameter: 530 mm
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4.4 ★★★★★
Based on 118 reviews
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Product Reviews
★★★★★ 5
Perfect fit, no problems.
Style: Standard Air Filter
It fit perfect in my grandson's 2013 Subaru Outback. It went right in with no problem. And you can't beat the price. Will definitely purchase again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 13, 2026
★★★★★ 4
Did not fit well - IMO
Style: Advanced Air Filter
Seems to fit but not as snug as the original...should work but not awesome
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Reviewed in the United States on September 24, 2024
★★★★★ 5
Fit 2009 Subaru Forester
Style: Standard Air Filter
Perfect fit for 2009 Subaru Forester. Great price and fast shipping. Arrived undamaged. Would buy again.
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Reviewed in the United States on December 8, 2025
★★★★★ 5
Great aftermarket parts
Style: Standard Air Filter
Every product I bought from this brand has been fantastic. From filters to air sensors, everything has been high quality and works very well. They are an exact fit replacement.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 11, 2025
