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Description
Manley H-TUFF Series 1,200 + HP Forged 4340 H-Beam 6.125" ConrodsForged from 4340 chrome moly steel, Manly H Beam 6. 125" rods arrive to you fully machined, Shot peened & are designed for use in today's high performance engines. Manley have been at the forefront of premium quality, Tried, tested & proven components to support high performance builds, Whilst keeping costs down. Since the early 60's, Manley have been a proud name in the drag racing & motorsport scene with a solution to many racers needs. Your Manley
Forged from 4340 chrome moly steel, Manly H-Beam 6.125" rods arrive to you fully machined, Shot peened & are designed for use in today's high performance engines.Manley have been at the forefront of premium quality, Tried, tested & proven components to support high performance builds, Whilst keeping costs down.
Since the early 60's, Manley have been a proud name in the drag racing & motorsport scene with a solution to many racers needs.
Your Manley H-TUFF Conrod Features
- Manufactured from 4340 forgings;
- Heat treated;
- stress relieved;
- shot peened;
- 100% magnafluxed;
- Weight matched sets +- 1.5 grams;
- Cap fasteners are premium 7/16” ARP 2000;
- Rod Length: 6.125" inch;
- Big End Bore: 2.225";
- Big End Width: 0.941";
- Pin End Width: 1.060";
- Pin Bore: .9281";
- Weight: 680 grams (each rod);
- Part Number: 15051R-8;
- 1,200+ HP (Drag Race) - H-Tuff rods ratings;
Need Some Help With Your Manley Conrods?
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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
4.9 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
Efird, a great product
Size: 8 Fl Oz (Pack of 1)
Used this in a Troy Built Garden Tiller, the tiller would stall and hard to crank until we use the Sta Bil Fast Fix, tiller now runs great and does not stall.
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Reviewed in the United States on April 25, 2026
★★★★★ 5
Worked great, saved me hundreds.
Size: 8 Fl Oz (Pack of 1)
I've had issues with the carburetor on my 2003 Honda ATV for years. It has needed cleaned regularly to stay running, and one repair shop wanted over $400 to replace the carburetor. One treatment with STA-BIL and it's running smooth again. Very impressive.
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Reviewed in the United States on May 21, 2026
★★★★★ 4
Great for 2 cycle, meh for 4 cycle.
Size: 8 Fl Oz (Pack of 1)
This stuff is flat out amazing for 2 cycle small engines, works like advertised. 4 cycle isn't as good, if your engine hasn't ran in years, you'll still have to clean the carb, but it does help some. The 2 cycle oil for one is a lubricant and inhibits varnish buildup (especially a synthetic premium brand), and usually premium oil has a fuel stabilizer in it. Plus if you don't have a float bowl, there's not enough fuel for phase separation. I also use it in my mix for my ultrasonic cleaner when cleaning carbs. Overall a very good product, but understand it's limitations in this modern age of ethanal fuel.
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Reviewed in the United States on April 12, 2026
★★★★★ 5
It works well.
Size: 8 Fl Oz (Pack of 1)
Great product that delivers on what it says it does. This won’t fix a mechanical problem or damaged component, but it will fix a stuck float, varnished tank, gummed up jet, or partially blocked emulsion tube.
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Reviewed in the United States on May 14, 2026
★★★★★ 5
It Works
Size: 8 Fl Oz (Pack of 2)
This stuff works. I added it to my four 5 gallon gas cans before filling them up. I’ve used 10 gallons of gas in my lawn tractor so far and can tell it likes it. I do annual maintenance before summer and check or change the spark plug so it performs the best it can. I have 508 hours on it and with this it seems like it idols smoother, which indicates it has helped in the carburetor since I haven’t had to remove it and clean it. Works great.
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Reviewed in the United States on April 30, 2026