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Description
Flowtech Long Tube Header for 1966-74 Dodge/Plymouth - Black Paint - 13100FLTOverview: Flowtech headers are the perfect combination of performance and value. Flowtech long tube headers are precision engineered using mandrel bent tubing, formed collectors and 5 16" flanges with sealing rings for a leak free seal. All mounting hardware and gaskets are included for a simple installation. This header is coated in a high heat resistant black paint for a stealthy appearance. Features: Mandrel Formed Power Plenum Leak Test For Max
Overview:
Flowtech headers are the perfect combination of performance and value. Flowtech long tube headers are precision engineered using mandrel bent tubing, formed collectors and 5/16" flanges with sealing rings for a leak-free seal. All mounting hardware and gaskets are included for a simple installation. This header is coated in a high heat resistant black paint for a stealthy appearance.
Features:
- Mandrel-Formed Power Plenum
- Leak Test For Max Performance
- Fuel Economy From The Engine
- Constructed of .049 cold roll flash mild steel tubing
- Include All Mounting Hardware
- Leakproof O-Ringed Port Seals
- Precision engineered for fit, performance and economy
Fitment Notes:
- Will not fit with A.I.R. injection pump.
- It may be necessary to raise the automotive column cross shaft linkage by rotating the mounting brackets on the frame and transmission 180º
- Will not fit vehicles with power steering.
- Breaking in an engine with ceramic coated headers WILL result in damage to the coating and will VOID all warranties. Ceramic coated headers require several heat cycles to fully cure before they will withstand extreme heat. Flowtech recommends using cast iron exhaust manifolds or old headers to break in new engines to avoid coating damage.
- The use of header wraps can cause the header tubes to crack or rust due to excessive heat and moisture build-up. Flowtech does not recommend the use of header wraps as this will void the warranty.
Applications:
| Year | Make | Model | Engine | Notes |
| 1967-1969 | Dodge | Dart | 4.5L V8 273 CID | See Fitment Notes Above |
| 1968-1974 | Dodge | Dart | 5.2L V8 318 CID | See Fitment Notes Above |
| 1968-1973 | Dodge | Dart | 5.6L V8 340 CID | See Fitment Notes Above |
| 1974 | Dodge | Dart | 5.9L V8 360 CID | See Fitment Notes Above |
| 1970-1974 | Dodge | Challenger | 5.2L V8 318 CID | See Fitment Notes Above |
| 1970-1973 | Dodge | Challenger | 5.6L V8 340 CID | See Fitment Notes Above |
| 1974 | Dodge | Challenger | 5.9L V8 360 CID | See Fitment Notes Above |
| 1966-1974 | Dodge | Charger | 5.2L V8 318 CID | See Fitment Notes Above |
| 1971-1973 | Dodge | Charger | 5.6L V8 340 CID | See Fitment Notes Above |
| 1974 | Dodge | Charger | 5.9L V8 360 CID | See Fitment Notes Above |
| 1967-1968 | Dodge | Coronet | 4.5L V8 273 CID | See Fitment Notes Above |
| 1967-1974 | Dodge | Coronet | 5.2L V8 318 CID | See Fitment Notes Above |
| 1972-1973 | Dodge | Coronet | 5.6L V8 340 CID | See Fitment Notes Above |
| 1973-1974 | Dodge | Coronet | 5.9L V8 360 CID | See Fitment Notes Above |
| 1967 | Plymouth | Barracuda | 4.5L V8 273 CID | See Fitment Notes Above |
| 1968-1974 | Plymouth | Barracuda | 5.2L V8 318 CID | See Fitment Notes Above |
| 1968-1969 | Plymouth | Barracuda | 5.6L V8 340 CID | See Fitment Notes Above |
| 1972-1973 | Plymouth | Barracuda | 5.6L V8 340 CID | See Fitment Notes Above |
| 1974 | Plymouth | Barracuda | 5.9L V8 360 CID | See Fitment Notes Above |
| 1967-1968 | Plymouth | Belvedere | 4.5L V8 273 CID | See Fitment Notes Above |
| 1967-1970 | Plymouth | Belvedere | 5.2L V8 318 CID | See Fitment Notes Above |
| 1967 | Plymouth | Belvedere II | 4.5L V8 273 CID | See Fitment Notes Above |
| 1967 | Plymouth | Belvedere II | 5.2L V8 318 CID | See Fitment Notes Above |
| 1973-1974 | Plymouth | Cuda | 5.2L V8 318 CID | See Fitment Notes Above |
| 1970-1973 | Plymouth | Cuda | 5.6L V8 340 CID | See Fitment Notes Above |
| 1974 | Plymouth | Cuda | 5.9L V8 360 CID | See Fitment Notes Above |
| 1970-1974 | Plymouth | Duster | 5.2L V8 318 CID | See Fitment Notes Above |
| 1970-1973 | Plymouth | Duster | 5.6L V8 340 CID | See Fitment Notes Above |
| 1974 | Plymouth | Duster | 5.9L V8 360 CID | See Fitment Notes Above |
| 1968 | Plymouth | GTX | 5.2L V8 318 CID | See Fitment Notes Above |
| 1971-1973 | Plymouth | Road Runner | 5.6L V8 340 CID | See Fitment Notes Above |
| 1974 | Plymouth | Road Runner | 5.9L V8 360 CID | See Fitment Notes Above |
| 1967-1968 | Plymouth | Satellite | 4.5L V8 273 CID | See Fitment Notes Above |
| 1967-1974 | Plymouth | Satellite | 5.2L V8 318 CID | See Fitment Notes Above |
| 1972 | Plymouth | Satellite | 5.6L V8 340 CID | See Fitment Notes Above |
| 1974 | Plymouth | Satellite | 5.9L V8 360 CID | See Fitment Notes Above |
| 1967-1969 | Plymouth | Valiant | 4.5L V8 273 CID | See Fitment Notes Above |
| 1968-1969 | Plymouth | Valiant | 5.2L V8 318 CID | See Fitment Notes Above |
Specs:
| Brand | Flowtech |
|---|---|
| Collector Diameter | 3.00 inch |
| Bolt Size | 5/16-18 x 3/4 |
| Emission Code | 4 |
| Engine | Chrysler Small Block LA |
| Header Finish | Black Paint |
| Header Style | Long Tube |
| Primary Tube Dia. | 1-5/8 inch |
| Product Type | Headers |
| Tube Material | Mild Steel |
| Warning | California Proposition 65 |
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
4.4 ★★★★★
Based on 23 reviews
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Product Reviews
★★★★★ 3
Hard to assemble
Color: Grey
This is extremely hard to put together, but once its together it is pretty good. You will need to secure it to something. It falls over.
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Reviewed in the United States on March 6, 2026
★★★★★ 5
Works well!
Color: Grey
Works great!
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Reviewed in the United States on May 4, 2026
★★★★★ 5
Versatile Room Divider With Easy Assembly and Strong Coverage
Size: 3 Panel 12FT W
I picked up this Siebwin 3-panel folding room divider mainly for privacy and room separation, and overall it works very well.
Assembly is very straightforward, and the divider can be set up, taken apart, and stored without much effort. The fabric quality feels good, and the frame construction is stronger and more stable than expected. The support tubes especially feel well built and help keep the divider standing securely.
One feature I really liked is the flexibility of the design. The panels can be used together as a complete divider or separated depending on the setup and available space. That makes it much more versatile for different room layouts or temporary privacy needs.
The coverage is also very good, and the size matches the manufacturer’s description accurately. The fabric blocks light and background visibility well enough to provide solid privacy without feeling overly heavy. The wider feet also help improve stability compared to thinner folding dividers.
Another positive detail is that everything arrived complete with no missing parts or damaged pieces, which made assembly much easier and faster.
Compared to cheaper privacy screens, this one feels more durable and easier to customize depending on the situation. In terms of value for the money, it feels like a very practical and worthwhile purchase considering the size, flexibility, and build quality.
Overall, a versatile and well-built room divider with easy assembly, strong privacy coverage, stable construction, complete included parts, flexible panel configuration, and excellent everyday functionality.
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Stable, flexible in deployment configuration, creates true privacy and looks great.
Size: 3 Panel 12FT W
This is the second room divider panel I have installed, and there are several features about this one that I like much better than my older one.
The fact that there are no gaps and that the material is thicker means you get more privacy or more hiding power, if you wish. My older divider has vertical spaces between each of the panels and the panels are half as wide as the Siebwin panels, so there are many vertical spaces. The Siebwin divider really creates privacy.
Another feature that I really appreciate is that the legs are wider and stand off from the floor. On my older one the legs are flat and they're rather awkward to adjust because they create more drag on the floor. The feet on the older one also loosen if you turn them counter clockwise, so adjustments of configuration that require the feet to be moved are more complex.
The older divider also must be deployed in a zig-zag fashion because he feet are not as wide, but this new one can be deployed and stable in a straight, an "N" shape or an arc. They are both the same length, but because the older one must be use in a zig-zag deployment it doesn't reach to the length of the new one.
The Siebwin divider definitely costs more at $103.48, but it sports several features and advantages over the other brand, so it does a better job and is worth the extra cost.
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Reviewed in the United States on May 25, 2026
★★★★★ 4
Easy to assemble, does the job, material is shiny nylon and shows creases, minor defects, sloppy
Size: 3 Panel 12FT W, Size: 3 Panel 12FT W
The Siebwin room divider is a good idea, and for the price, it mostly delivers on the intended functionality. I ordered the 12 foot, 3-panel version mainly to hide an unfinished basement storage area that had become an eyesore. It works well for that purpose and gives the space a cleaner appearance without spending the kind of money that more decorative dividers or custom partitions cost. If you need something temporary, portable, or mainly functional, this is a viable option.
There are a few limitations that became obvious during setup and use. The first thing I noticed was that the weld quality on some of the metal poles is fairly sloppy. Once the cover is installed, you do not really see it, but up close, it does not look especially refined or professional. The blackout material also is not a matte canvas style fabric as I expected. It has more of a shiny nylon appearance, and the creases are fairly visible. Being that it’s more of a nylon, I’d be hesitant to try steaming it to remove the creases. However, the creases do not matter if you are using it in a basement, dorm, or shared room, but for photography, video work, or a professional office setting, the appearance could be disappointing. The fabric is thick enough, though. It blocks visibility well enough, but strong light behind it still shows through to some extent, nothing deal-breaking. Also, my fabric appeared to be slightly defective. The hook and loop strip on one of the bottom sections was off-center and couldn't be totally attached because it was lined up with one of the legs. I originally hoped to use this as a video backdrop, but I will probably end up replacing the fabric with a proper green screen or canvas material while continuing to use the frame itself. For now, it does a good job of covering my basement junk.
Assembly was actually easier than I expected and took roughly 15 to 20 minutes. The longer vertical poles are tethered together similarly to tent poles, which made setup straightforward and fairly intuitive. The shorter horizontal pieces slide and snap together to the top and bottom of the vertical assembly. After each section is assembled, the divider panels connect together with metal plates and two knurled screws (at the top and bottom), so no tools are really required. A few screws were difficult to start because paint had gotten into the threads, but once they caught, they tightened down normally. The feet install with similar knurled fasteners and help keep the divider reasonably stable. One thing to watch for during setup is the fabric orientation. There is one arrow indicator in the middle of the fabric to indicate up. However, if you need another indicator, the smaller hook and loop strip goes on the bottom while the longer strip goes on top. I realized mine was upside down right before finishing and had to redo it. I wasn't difficult to redo, despite the defect in mine.
The overall design is practical and easy to move around. I do like that the panels can fold and bend into different shapes depending on the space. The widened feet help stability, although when trying to stretch the fabric tight, I noticed the poles sometimes wanted to overlap slightly at the joints. Tightening everything helped somewhat, but it still happened occasionally. The divider feels adequate for normal indoor use, though I would not expect premium durability or luxury-level fit and finish at this price point. The entire device can also be easily disabled and stored in a tote if you need it completely out of the way. It comes with assembly instructions, but even if you didn’t have them, it’s easy to build without them (save a mistake or two).
In terms of value, I think the Siebwin divider mostly matches its price. Around $100 gets you a large freestanding partition with decent usability and easy assembly, but there are compromises in materials, appearance, and refinement. The defects are also off-putting, but hopefully you won't have them. Higher-end room dividers can easily cost two or three times more, so some of the tradeoffs are expected. I also noticed cheaper alternatives online, but based on the quality here, I suspect those would probably have even more issues. For practical home use, temporary privacy, hiding storage areas, or separating shared spaces, this is a good option as long as expectations stay realistic.
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Reviewed in the United States on May 18, 2026