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Fabspeed Porsche 911 Carrera Muffler Bypass Pipe with Adjustable Turndown (1976-1989)

Marsoni M251S
Sale price$179.97
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Fabspeed Porsche 911 Carrera Muffler Bypass Pipe with Adjustable Turndown (1976-1989)SKU: POR. 911. MB Fabspeed Porsche 911 Carrera Muffler Bypass Pipe with Adjustable Turndown (1976 1989) This Fabspeed muffler bypass pipe replaces the primary cigar shaped OEM muffler on Porsche 911 models from 1976 to 1989. It delivers 10+ whp and 8+ ft lbs torque gains with sharper throttle response and 18 20 lbs weight reduction. The adjustable 90 degree turndown tip controls exhaust volume for track or street driving. Key Features Power Gains:
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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.
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4.6 ★★★★★
Based on 223 reviews
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Verified Purchase
Doplar
Carnegie, US
★★★★★ 5
Satisfied
Size: (Pack of 1)
Good product
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026
S
Verified Purchase
Shane walton
Chelsea, US
★★★★★ 5
Perfect fit
Size: (Pack of 1)
Perfect fit
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
B
Verified Purchase
Bradford Van Dam
Phoenix, US
★★★★★ 5
I highly recommend this air filter
Size: (Pack of 1)
Why did you pick this product vs others?: Great buy for the money Smell: Smells fresh Air quality: The air quality in the car cabin smells fresh Filter quality: FILTER SEEMS TO BE PROFESSIONAL QUALITY Ease of installation: SUPER EASY TO INSTALL 
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 21, 2025
D
Verified Purchase
David B.
Port Orchard, US
★★★★★ 4
Affordable and very good
Size: (Pack of 1)
Not sure if there is a longevity issue with these but these are fair priced and fit perfectly in my 21’ accord sport and 20’ CRV-L. I will be buying this again next year
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Reviewed in the United States on January 28, 2024
J
Verified Purchase
J
San Leandro, US
★★★★★ 5
Clear Filter
Size: (Pack of 1)
Vehicle: 2020 Honda Accord LX 1.5T CVT The stealership wanted $60 in my area to change this out. Just look up online how easy it is to do it yourself. Can easily be handled in a minute. The only real thing to note is that it took almost a full gas tank for the car's computer to re-learn how to idle smoothly again. Of course, this is because it learns to compensate for the old dirty filter. So it has to get used to the new/fresh one. Overall, the look and feel of this product is great. Very similar to OEM. After the idle smoothed out it's virtually identical in performance. Would recommend to anyone.
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Reviewed in the United States on May 1, 2024

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