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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
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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
4.6 ★★★★★
Based on 10 reviews
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Product Reviews
★★★★★ 5
Loved this book from beginning to end
Format: Hardcover
Absolutely love this book!!!every story was written perfect, highly recommend this to any Batman fan
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 17, 2025
★★★★★ 5
Grant Morrison and Batman Omnibus, You need to own this
Format: Hardcover
I never bought an Omnibus before, I could never decide which one to buy. I got this on my recommendations and it brings great stories like Batman & Son, Batman The Black Glove and Batman R.I.P. 3 phenomenal stories plus so much extra content. The guest stars are great from Damian starting as Robin, Tim Drake, Dick Grayson, Batman Inc, The great Bat-Mite, Ras Al Ghul, Talia, Bane, The Joker, Man-Bat, Alfred who steals the show as always, Gordon, The return of Batman of Zur-En-Arrh which if you know a little bit about the comics it's an amazing suit full of color and the way Grant makes it modern is awesome. The art is amazing, the writing is sharp, the cameos and call backs are incredible. The price is great for some much content. The best story of the 3, is Batman R.I.P.. just when you think Batman is down, he always comes back for more. Go and click add to cart and buy it, you won't regret it.
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Reviewed in the United States on January 19, 2023
★★★★★ 5
One of the most important batman stories
Format: Hardcover
Arrived in perfect condition. Grant Morrison is an amazing author. The art work is outstanding. Am almost done with the second volume.
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Reviewed in the United States on November 5, 2025
★★★★★ 5
Batman for seasoned veterans
Format: Hardcover
One of the best Batman runs to date. Filled with exciting art and stories. This review is more of a warning to newcomers. Morrison is a highly talented writer and will use writing techniques and story elements from older dc books. So if you're not familiar with the depth of continuity DC has then I'd probably start with Scott Snyder's Batman run. But don't let that scare you from this book, it's amazing to say the least, it just takes a lot of comic knowledge to really appreciate.
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Reviewed in the United States on September 27, 2020
★★★★★ 4
Great product, Careless packaging!
Format: Hardcover
Product was great. Good value at the time I bought it. My only complaint is Amazon's shipping and packaging. They don't make any effort in trying to make the package secure for collectible items. All my collectible books I get from Amazon come with at least some small dings and dents. Would give it 5 star otherwise!
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Reviewed in the United States on April 4, 2021