


Weapon R Secret Weapon 4 SW1 Air Filter Gunmetal/Black
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Weapon R Secret Weapon 4 SW1 Air Filter Gunmetal/BlackSKU: 710 111 102 Weapon R Secret Weapon 4 SW1 Air Filter Gunmetal Black Universal 4 Inch Inlet The Weapon R Secret Weapon 4 SW1 Air Filter in gunmetal black fits vehicles with custom 4 inch intake systems. This universal conical filter increases throttle response and engine power by pulling in cooler denser air. Its hybrid design works reliably on street and track for cars trucks and motorcycles. Key Features Hybrid Conical Shape: Large 7 inch top
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Your Weapon R Secret Weapon 4 SW1 Air Filter Gunmetal/Black orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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4.8 ★★★★★
Based on 1211 reviews
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Product Reviews
★★★★★ 5
💯% Authentic NGK Made in Japan.
Got these for my 2016 Subaru Crosstrek. You can't go wrong with NGK, these are 💯% AUTHENTIC, and made in Japan, unlike other NGK plugs that may be sold by other sellers which could be made in Thailand. The Subaru Crosstrek is running like a brand new vehicle after I put these puppies in it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 23, 2025
★★★★★ 5
buy these!!
these are legit original NGK, superior plugs, will buy again
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026
★★★★★ 5
Worked like a charm
Worked like a charm. The box and packaging were adequate from keeping the gaps of the plugs from being squished.
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Reviewed in the United States on May 13, 2026
★★★★★ 5
Perfect!!
As I expected, no more to say only I'm happy I got it.
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Reviewed in the United States on April 29, 2026
★★★★★ 5
Works great
Works great
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Reviewed in the United States on March 30, 2026
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