Product Description
The 301cc & 420cc Straight Back Header Pipe is an excellent choice for those looking to upgrade the performance of their small engine vehicles. This header pipe is designed to fit 301cc and 420cc engines found in go-karts, mini-bikes, and other small motor vehicles. Its straight back design allows for improved exhaust flow, which translates into better engine performance. Made from high-quality materials, this header pipe is durable and built to last, even under heavy use. It is easy to install and is a direct replacement for the stock header pipe, making it a convenient upgrade option. This header pipe is a great choice for racing applications and is compatible with a variety of small engine vehicles. With its quality construction and improved performance, the 301cc & 420cc Straight Back Header Pipe is a reliable option for any small engine enthusiast looking to get the most out of their vehicle.
Wide Power Range
.990x .995 x 1.070 x 1.220 x 13
The end flares out to 1-5/16". Use #B91XL for a muffler if needed.
Due to the bend, you will need to do some modification to run this muffler. The inside stud will hit the pipe. You would either need to stack washers or stack an exhaust flange. We suggest the Header Pipe Allen Bolts with Safety Wire.
Will not fit new non hemi model 420
Will not fit 301 without modification
Fits:
- 301cc Predator
- 420cc Predator
- Honda GX 240
- Honda GX 270
- Honda GX 390
Product Videos
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Product Reviews
24 Reviews Hide Reviews Show Reviews
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301cc & 420cc Straight Back Header...
301cc & 420cc Straight Back Header Pipe
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Header...
I bought the header along with breather and jet kit. They work together amazing. Power you can feel.
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Way better than...
Gives it a better look and a ferocious sound
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Great product! Gasket that came with it was bent...
Great product! Gasket that came with it was bent to the point of breaking and it isn't compatible with the 420cc duromax engine. Incompatible was mu fault though
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301cc & 420cc Straight Back Header...
301cc & 420cc Straight Back Header Pipe
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Direct bolt-on, but interferes with the...
I have a GX270 on a coleman minibike, and while it should work for most applications, it interferes with the framework, but I blame myself for such a crazy engine swap; not everything’s gonna work out perfectly. I would recommend you pull the studs out of the engine and use bolts, however, as I have to use 8 washers on both sides until I get this done myself.
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Great exhaust...
Great little addition to your motor, Perfect fit, looks nice, and sounds awesome
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Muffler
Great product but don’t fit me 420 cc
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Great...
Looks and sound really good, give the engine a cleaner look
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Custom...
I have a Ct200u with a 420 predator on it. Fits great, just does not clear the rear rack on the bike. I went to my pipe bender and it clears now, custom fit! Good buy!