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USA
- USA
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- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 5 - Jul 10
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Description
Flowmonster Performance Muffler 3 in Dual inlet & outlet 12599-FM 409 StainlessOverview The Flowmonster series of absorption style mufflers deliver a moderate tone for the enthusiast looking for a deeper, more aggressive exhaust note than most OE (Original Equipment) mufflers, unlike the racey exhaust note associated with "chambered" style mufflers. Interior construction features 3. 50 inch "straight through" perforated 409 stainless steel tube surrounded by high temperature sound absorption packing material which helps to
Overview
The Flowmonster series of absorption style mufflers deliver a moderate tone for the enthusiast looking for a deeper, more aggressive exhaust note than most OE (Original Equipment) mufflers, unlike the racey exhaust note associated with "chambered" style mufflers.
Interior construction features 3.50 inch "straight-through" perforated 409 stainless steel tube surrounded by high-temperature sound absorption packing material which helps to deliver a deeper, mellower exhaust note. The internal design is reversible allowing the flexibility to be installed in either direction to best accommodate fitment with the intended vehicle. The fully MIG-welded 409 Stainless Steel material is embossed with the "FLOWMONSTER" logo on the case.
Interior construction features 3.50 inch "straight-through" perforated 409 stainless steel tube surrounded by high-temperature sound absorption packing material which helps to deliver a deeper, mellower exhaust note. The internal design is reversible allowing the flexibility to be installed in either direction to best accommodate fitment with the intended vehicle. The fully MIG-welded 409 Stainless Steel material is embossed with the "FLOWMONSTER" logo on the case.
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
- This is a Universal Fit muffler - Not a Direct fit. Some adaption may be required for proper fitment on some applications
| Body Height (in) | 5 |
| Body Length (in) | 22 |
| Body Width (in) | 11 |
| Finish | Natural |
| Fitment | Universal |
| Inlet Connection Type | Pipe Connection |
| Inlet Inner Diameter (in) | 3 |
| Inlet Outer Diameter (in) | 3.13 |
| Inlet Position | Dual |
| Material | 409 Stainless Steel |
| Muffler Series | Flowmonster |
| Muffler Type | Absorption / Glasspack |
| Outlet Connection Type | Pipe Connection |
| Outlet Inner Diameter (in) | 3 |
| Outlet Outer Diameter (in) | 3.13 |
| Outlet Position | Dual |
| Overall Length (in) | 28 |
| Reversible | Yes |
| Shape | Oval |
| Sound Level | Moderate Sound |
| Type of Muffler | Absorption |
| Part Number | 12599-FM |
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
4.1 ★★★★★
Based on 637 reviews
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Product Reviews
★★★★★ 4
ELEGANT & SOPHISTICATED WITH THE PERFECT SIZE AND STYLE!
Color: Black
I love the unique design of this clutch! There's THREE ways of carrying this clutch! 1) I can add a strap to make it a crossbody purse, 2) It has a wristlet strap, 3) Plus, the best is the long strap on the side of the clutch that allows me to place my hand through it and securely hold it in such a fashionable way! I get tons of compliments on it. I bought two, one in red and one in black. The leather-like material is durable, and the fixtures stay gold and do not fade. I use it daily, so it gets worn out within a year. The rubber edges would unfurl or get cracked. The zipper can break if you stuff the clutch too much, and the edges do get frayed easily, but for the cost, it's worth it! You can dress it up or wear it casually.
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Reviewed in the United States on July 10, 2025
★★★★★ 5
Beautiful wristlet
Color: Silver
I have really enjoyed the convenience of my wristlet and it was the perfect size.
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Reviewed in the United States on December 3, 2024
★★★★★ 5
Awesome bag!
Color: Silver
I LOVE this bag! I use it daily. My only wish is that it was larger, although it does hold much more than you might think.
I tried to post a pic of the inside and all it holds, but the app won't let me right now. I'll check back later.
Until then, the list includes...
Credit, check, and insurance cards (all 8 of them),
2 pens,
A pen light,
Fingertip spray bottle for alcohol,
Mirror,
ID,
Several business cards,
Folding phone stand shaped like a credit card,
Charging cord,
Charging battery (a hefty one with qi charging),
Prescription sunglasses inside a box for protection,
A magnifying card with light.
My phone is too big to fit in the zipper compartment (Note 10+), so I usually use a lanyard. I COULD fit it into the main compartment, but it's tight. I attach my keys to the loop with the wrist strap. Otherwise they would scratch my phone if I choose to put it inside. An expanding bottom along with just an inch added to both the height and length would make all the difference for those needed items.
If the owners/designers read this, I'd request a divider going lengthwise as well to keep my phone separate and protected. It doesn't have one, or a pocket for a large phone. I do believe, however, that the latest folding Razr or Samsung's Z-Flip would easily fit into the pockets provided with no problem.
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Reviewed in the United States on October 10, 2022
★★★★★ 5
A must have
Color: Black, Color: Black
Absolutely love
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Reviewed in the United States on December 20, 2025
★★★★★ 5
Best clutch
Color: Black
This clutch fits everything you need amd and can be used with or without a wrist strap or with the handle. Love it!!! Had for three months and is still is in "as new condition" and when I need a bigger purse, I just add this inside my tote.
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Reviewed in the United States on June 20, 2021