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Ships within 48 hours · Estimated delivery Jul 16 - Jul 21
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Description
MagnaFlow Muffler Mag 14X5X8 2.25 X 2.25 S/DThe MagnaFlow 5 X 8in. Oval Straight Through Performance Exhaust Muffler 12138 is engineered to enhance your ride with a healthy helping of our signature exhaust sound and dyno proven performance thanks to its free flowing straight through perforated stainless steel core wrapped in stainless steel mesh and acoustic fiber fill. The reversible, universal 2. 25 2. 25in. diameter inlet outlet Straight Through layout allows you to install it in whatever
The MagnaFlow 5 X 8in. Oval Straight-Through Performance Exhaust Muffler 12138 is engineered to enhance your ride with a healthy helping of our signature exhaust sound and dyno-proven performance thanks to its free-flowing straight-through perforated stainless steel core wrapped in stainless steel mesh and acoustic fiber fill. The reversible, universal 2.25/2.25in. diameter inlet/outlet Straight-Through layout allows you to install it in whatever orientation and configuration you see fit. However, professional installation is highly recommended. Muffler 12138s weight-optimized 5x8x14in. oval-shaped body features a satin finish that elevates the overall aesthetics of your current exhaust setup. 12138 is made of durable, corrosion resistant stainless steel and produced using cutting-edge CNC precision robotic manufacturing techniques, all backed by MagnaFlow's limited lifetime construction warranty.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 5 reviews
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Product Reviews
★★★★★ 5
Great product!
Color: Black
Use this under my hard hat to keep from sliding everywhere. I have bought several over the years and this have been my favorite so far. Will definitely buy again.
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Reviewed in the United States on May 13, 2026
★★★★★ 4
Good but if the elastic band were wider it would be great
Color: Black
This is a great under helmet or perspiration barrier for the face during heavy spinning workouts. Sadly to avoid an indentation to your forehead, you must wear it inside out because the sewing band is narrow and tight.
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Reviewed in the United States on March 3, 2026
★★★★★ 5
"Head" of the house gift...
Color: Black
Great fabric, nice fit..
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Reviewed in the United States on May 23, 2026
★★★★★ 1
Too damn small
Color: Black
Way too small for an adult. It doesn't even fit my 11 year old. Unfortunately I didn't open it immediately or I would have returned it. Now I'm stuck with something nobody in my house can use.
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Reviewed in the United States on April 16, 2026
★★★★★ 3
One size definitely doesn’t fit. Otherwise Ok.
Color: Black
OSFM - one size fits most. It should be OSFS - one size fits small/some. Measured my head size and according to their chart I’m l/XL. This cap is tight fitting and gives you a headache after an hour. Otherwise it’s fine. Keeps your head cool, is absorbent and works well under a helmet.
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Reviewed in the United States on November 21, 2025
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