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- USA
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Ships within 48 hours · Estimated delivery Jul 19 - Jul 24
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Flowmonster Performance Muffler 2.50 Dual IN/2.50 Dual OUT 11386-FM 409 StainlesOverview 409 Stainless Steel performance mufflers! Hidden beneath your ride lies a powerful creature destined to dominate. FlowMonster chambered and straight through style mufflers create an aggressive exhaust note giving a powerful voice to your car truck SUV. FlowMonster mufflers are constructed of 16 gauge aluminized steel and 409 stainless steel and are 100% MIG welded for maximum strength and durability. The chambered design cancels out unwanted
Overview
409 Stainless Steel performance mufflers! Hidden beneath your ride lies a powerful creature destined to dominate. FlowMonster™ chambered and straight through style mufflers create an aggressive exhaust note giving a powerful voice to your car/truck/SUV. FlowMonster mufflers are constructed of 16-gauge aluminized steel and 409 stainless steel and are 100% MIG welded for maximum strength and durability. The chambered design cancels out unwanted frequencies with no packing producing an aggressive exhaust note that will not change with time. FlowMonster chambered mufflers are coated with high heat-resistant silver paint for an aggressive look under your car.
Features: - 409 Stainless Steel construction for superior corrosion resistance and good looks
- Interior construction features high-temp interior sound absorption material delivering a deeper, mellow exhaust tone
- Perforated High-Flow straight-through tube design for increased exhaust flow
- Moderate increase in interior tone over most OE mufflers
- A stainless steel performance muffler at an economical price
- Internal Design is reversible allowing flexibility to be installed in either direction
- Sold Individually
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
4.7 ★★★★★
Based on 11 reviews
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Product Reviews
★★★★★ 5
Comfortable shirt
Color: Teal02, Size: XX-Large
A great feel , so comfortable to wear!!!
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Reviewed in the United States on April 18, 2026
★★★★★ 1
Won’t last no durability
Color: Teal01, Size: XX-Large
Terrible shirt , it fades noticeably in different areas after 3rd wash they are unwearable now very disappointing
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Reviewed in the United States on April 25, 2026
★★★★★ 3
Nice fit- No help for “man boobs or belly”
Color: Blue, Size: XX-Large
The shirt is beautiful and nicely made. Fabric is nice, but thin. However, the claims about “belly fat” and “man boobs” are just plain not true.
Fabric is stretch and thin. This actually exaggerates those things if the shirt is snug at all. Size does run true.
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Reviewed in the United States on September 7, 2025
★★★★★ 5
This is a GREAT product line! Excellent fit!
Size: XX-Large, Color: Whiteblueleaf, Size: XX-Large, Color: Whiteblueleaf
Ordered 5 of these for a trip to Hawaii- and they did NOT disappoint! I don't do well in humidity, and these were the solution. The fabric is light but strong, and I am a bigger guy who usually where's a 2X Tall- the 2X was perfect. Just the right length, not too short like almost all of the other shirts I get off Amazon.
Cool and moisture wicking without and discoloration, no embarrassing sweat marks and they do not hold any odor. Beats the regular cotton shirts for sure. After washing the colors, fit and finish have all held up wonderfully!
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Reviewed in the United States on April 17, 2026
★★★★★ 5
I love golf shirts !
Size: XX-Large, Color: Greengolf
I really love the design and feel of this shirt. The rub, is that it’s wrinkled all the time!! Even after a couple of washings. Also tried to water spray and let hang dry and also redry in the dryer.
I’ve also worn it golfing. Hoping it would get better. Maybe my imagination, but does seem a little better. Golfing isn’t supposed to be a fashion show. But comfy nice shirts a must. I have this same shirt in black background. Love it, and isn’t as wrinkled. Black isn’t the best color on really warm summer days.
Might keep this for a bit and see if it settles. No TV cameras on my golf game, ha! Just seem to play better when I feel good and look good. And most courses require collared shirts.
Ok! Washed it again and let it hang dry! Wrinkles are gone!! Great shirt!! Now have it in several colors! The lighter colors are great!! Fend off the heat and nice enough to wear to church!!
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Reviewed in the United States on July 11, 2025