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SP Concepts Big Bore 4.5 for Harley Davidson
SP Concepts Big Bore 4.5 for Harley Davidson
SP Concepts Big Bore 4.5 for Harley Davidson
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SP Concepts Big Bore 4.5 for Harley Davidson

Marsoni M251S
Sale price$575.00
Pay 4 payments of $143.75 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
SP Concepts Big Bore 4.5 for Harley Davidson4. 5 HIGH FLOW PERFORMANCE ROLLED CONE MUFFLER WITH STEPPED BAFFLE FROM 2 TO 2 INCHES. INCREASES BOTTOM TO MID RANGE TORQUE AND HORSEPOWER ON ALL MOTORS. TUNED PROPERLY CAN ACCOMMODATE 88" TO 143". 065 STAINLESS STEEL HEADERS, STEPPED FROM 1 TO 1 7 8 TO 2 AT THE COLLECTOR HAND TIG WELDED FROM TOP TO BOTTOM MACHINED STAINLESS STEEL HEADER COLLARS 18MM O2 BUNGS WITH 12MM ADAPTERS, ALLOWS FOR STOCK OR AUTOTUNE SENSORS COMPLETE HARDWARE KIT WITH
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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
4.5 ★★★★★
Based on 2357 reviews
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Product Reviews
E
Verified Purchase
Edward Diaz
Port Orchard, US
★★★★★ 5
Well Made for price and style
Size: 10.5, Color: Black/Ivory
Great fit and very flexible. I also recommend buying shoe savers when purchasing this product. To help with toes wrinkles. The pair itself is stylish and very comfortable. Any purchase of this product will be greatly satisfied.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 16, 2026
P
Verified Purchase
Pierre
Omaha, US
★★★★★ 5
Nice shoes
Size: 11.5, Color: Black/Ivory
The are very comfortable, and look great.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
J
Verified Purchase
Jeffrey Clemons
Lake Worth, US
★★★★★ 4
Comfortable
Size: 9.5, Color: British Tan/Ivory
Great foot support. Wore all day with not foot or back pain.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
W
Verified Purchase
Walter R Moore
Pawtucket, US
★★★★★ 5
Quality at affordable prices.
Size: 11.5, Color: British Tan/Ivory
Best old guy shoes. They look great and have support for feet. You don't want cheap department shoes. You will pay for that in your later years.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 11, 2026
T
Verified Purchase
Tischina S.
San Leandro, US
★★★★★ 5
Excellent quality, just like the picture
Size: 10.5, Color: White/White
Looks just like the picture. My bf is a size 10.5 and we got just that and its a perfect fit.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2026

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