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Description
SpeedFactory Racing Billet -10AN Mega Flow Fuel Rail - K-SeriesSpeedFactory set out to build the ideal K Series fuel rail that will work for everyone from the bolt on K swapped street car to a 2000+hp methanol monster like SpeedFactory's Outlaw car. The SpeedFactory Billet K Series Mega Flow 10AN Fuel Rail is the result! Their Mega Flow rail features a GIGANTIC 0. 806 fuel bore with 10 ORB inlet outlets and Viton O rings. Perfect for high volume ethanol & methanol fuels, and the large internal volume helps dampen
SpeedFactory set out to build the ideal K-Series fuel rail that will work for everyone from the bolt-on K-swapped street car to a 2000+hp methanol monster like SpeedFactory's Outlaw car. The SpeedFactory Billet K-Series Mega Flow -10AN Fuel Rail is the result!
Their Mega Flow rail features a GIGANTIC 0.806” fuel bore with -10 ORB inlet/outlets and Viton O-rings. Perfect for high volume ethanol & methanol fuels, and the large internal volume helps dampen the pressure pulses created by the massive fuel injectors now commonly being used.
Three (3) -10 ORB ports allow user the option to feed or return from the ends OR under the center of the rail for a sleek, tucked look.
Vehicle Application/Fitment: All K-swapped ‘88-‘00 Civic / ‘90-‘01 Integra chassis and any universal K-swap applications. Fits most K-Series engines except direct-injection K20C and K20B engines. Fits RBC, PRB, and RBB intake manifolds and almost any aftermarket intake manifold.
Product Features:
- Precision CNC machined from 6061-T6 billet aluminum
- Black Anodized finish throughout adds durability & eliminates corrosion
- Laser-etched SFR logo
- -10AN ORB Inlet/Outlet ports with massive 20.4mm (0.806”) fuel bore supports even the most demanding 2000+hp turbocharged setups on high volume alcohol-based fuels
- Center feed/return port for tucked fuel line routing if desired
- One (1) 1/8 NPT port for fuel pressure takeoff option (example: gauge, sending unit, or wet nitrous feed) and includes one (1) Stainless Steel 1/8 NPT plug
- One (1) additional M6x1.0 threaded hole that can be used for mounting bracket (example: EBC solenoid, wiring d-ring, etc)
- Includes two (2) Stainless Steel M8x1.25x25mm socket head cap screws for fuel rail mounting & one (1) -10 ORB Male to -6AN Male feed fitting and two (2) -10 ORB Port Plugs for use with your commonly seen -6AN fuel system setups.
NOTE:
- Always make sure to thoroughly flush out any new fuel system components before use to make sure you do not get debris into your fuel injectors.
- Always check for fuel leaks before starting the engine.
- Replace all crush washers, o-rings, cushion rings, seal rings, and insulators when fuel rail is disassembled.
- Different combinations of fuel injectors, adaptors, and intake manifolds require various spacers/adaptors/o-rings/etc for proper installation. This is a normal part of setting up your fuel system and you will need to figure out the appropriate parts for your specific combination.
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
4.8 ★★★★★
Based on 22 reviews
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Product Reviews
★★★★★ 5
They’re fantastic!!!!
Size: X-Large, Color: Multicoloured E-(5-pack)
My clothing size is 16/18 and XL. Even though Amazon suggested a size XXL, I ordered my normal XL and they fit perfectly.
The fabric for this style is 92% bamboo viscose and is amazingly soft and almost silky feeling. I had ordered a different boy short in this brand but they were 80% bamboo viscose and the fabric was significantly heavier. I returned those and ordered these.
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Reviewed in the United States on April 25, 2026
★★★★★ 5
Great quality!
Fit Type: Boyshort, Size: Small, Color: Assorted Colors
I love them! They are simply comfortable and great quality. I use them every day I got one clean lmao 🤣 they are soft but they fit perfectly. Love it!
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Reviewed in the United States on May 25, 2026
★★★★★ 5
Fantastic
Fit Type: Boyshort, Size: X-Large, Color: Assorted Colors
I love these. These are so comfortable. They’re soft they’re silky. They fit just perfectly. I am definitely gonna be buying more of these because they are fantastic.
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Great quality
Fit Type: Boyshort, Size: X-Large, Color: Assorted Colors
⭐️⭐️⭐️⭐️⭐️ Super Comfortable and Great Fit!
I absolutely love these Hanes seamless boyshorts! The fabric is soft, stretchy, and doesn’t dig in at all. They stay in place perfectly throughout the day—no rolling or riding up. I love the mix of neutral and soft colors in the pack, and they hold up really well after washing. Perfect for everyday wear, lounging, or even under leggings since they don’t show lines. Definitely worth the price—will be buying more!
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Reviewed in the United States on October 22, 2025
★★★★★ 4
Reliable comfort
Fit Type: Boyshort, Size: X-Large, Color: Assorted Colors
I’ve tried a few cotton underwear brands, and these Hanes Originals boxer briefs are a dependable everyday option. Here’s my take after a few weeks of regular wear and wash cycles.
Comfort and Fit
Fabric:** 90–95% cotton with a touch of elastane/spandex for stretch. The material feels soft against the skin and breathes well, which helps avoid that suffocating feeling on hot days.
Elastic & Waistband:** The waistband sits comfortably at the natural hip line without digging in. It maintains shape after several washes, which is a plus compared to some cheaper cotton blends.
Rise & Coverage:** The mid-thigh rise offers modest coverage without feeling bulky. They stay in place during daily activities, workouts, and quick stretches.
Style and Practicality
Design:** Classic, no-frills styling that works well under jeans, skirts, or dresses. The boxer brief cut provides a little more coverage than regular briefs without feeling like bloomers.
4-Pack Value:** The 4-pack is convenient for rotation and helps keep laundry cycles simple. Inexpensive enough to replace slightly worn pairs without guilt.
Colorway:** Basic, versatile colors that pair with most outfits. If you’re after bright or patterned options, you might want to look elsewhere.
Durability and Care
Washability:** They hold up well in standard machine washes and tumble dry cycles. The fabric doesn’t pill noticeably, and the waistband maintains elasticity after multiple washes.
Pilling:** Minimal pilling for the first several months. If you’re tough on underwear or frequently wash on high heat, you may notice some wear sooner than later.
Comfort in Different Scenarios
Everyday Wear:** Great for day-to-day comfort and all-day wear. The breathable cotton keeps you cooler in warmer weather.
Active L activities:** Suitable for light workouts or active days, though for intense workouts you might prefer moisture-wicking blends.
Under Tight Clothing:** The smooth fabric and mid-thigh length work nicely under leggings or fitted outfits without visible lines.
Pros
Soft, breathable cotton blend
Comfortable waistband that doesn’t roll or dig
True mid-thigh coverage
Good value with a 4-pack
Durable after multiple washes
Cons
Not moisture-wicking like athletic-oriented underwear (if you need to stay dry during intense workouts)
Some people prefer a higher or lower rise depending on body type
Colors are basic; if you want prints or bolder colors, options are limited
Who I’d Recommend These For
Anyone seeking affordable, comfortable everyday underwear with a classic mid-thigh boxer brief silhouette.
People who prioritize cotton and breathability over high-tech moisture-wicking fabrics.
Those who like a simple, versatile pack suitable for mixed wardrobes.
If you’re deciding between Hanes Originals and something with more performance features, these are a solid everyday staple. They won’t wow you with luxury, but they deliver reliable comfort and durability at a sensible price.
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Reviewed in the United States on May 27, 2026