KANECJDL Exhaust Header Pipe for Predator 420 / GX240 GX270 GX390 Compatible Engines — Steel, High-Temp Finish

KANECJDL Exhaust Header Pipe is a direct-fit replacement header designed for Predator 420 and compatible Hond* GX240, GX270 and GX390 engines, restoring exhaust routing and resisting heat and corrosion.

This heavy-duty exhaust header pipe replaces worn or damaged headers on small horizontal-shaft engines used in generators, pressure washers, go-karts and other equipment. Built with durable welding, a high-temperature finish and supplied fasteners and gasket, the pipe is intended to simplify repair and extend the working life of your engine’s exhaust system. It is engineered for Predator 301cc/420cc models and aftermarket-fitment with Hond* GX-series engines where dimensions match.

How will this header pipe fit my Predator or Hond* engine?

The header is manufactured to match the bolt pattern and ports commonly found on Predator 301cc/420cc models and the Honda-style GX240, GX270 and GX390 heads used in many OEM and replacement situations. Fitment depends on matching flange spacing and exhaust outlet orientation—measure your existing header against the replacement before purchasing. The package includes the hardware you need for a straightforward swap.

• Fitment: Predator 420 parts replacement for Predator 301cc 8hp, 420cc 13hp
• Compatible with Hond* GX240, GX270, GX390 engine layouts where flange and port match
• Includes 1 exhaust pipe, 2 screws and 1 gasket for installation
• Verify flange bolt spacing and exhaust angle prior to ordering

What materials and finishes protect the pipe from heat and corrosion?

This header uses robust welds and a high-temperature paint finish to withstand exhaust temperatures and outdoor exposure. The welding technique reduces stress points that can lead to cracks, while the coating helps slow oxidation and resists flaking under heat cycling. These features extend life compared with untreated steel replacements.

• High-temperature paint to resist heat and corrosion
• Reinforced welding to minimize fracture risk
• Durable steel construction for long-term service

How difficult is installation and what’s included in the package?

Installation is designed to be straightforward for mechanically inclined users: remove the old header, clean the mounting surfaces, fit the new gasket and secure the supplied screws. No special tools are required beyond standard hand tools and possibly a torque wrench for proper clamp torque. If you run into fitment differences, minor adjustments or local hardware may be necessary.

• Simple bolt-on replacement for matching headers
• Comes with 2 screws and 1 gasket to complete installation
• Requires basic hand tools; torque wrench recommended

Will this header change performance or engine sound?

As a like-for-like replacement, the header’s purpose is to restore correct exhaust flow rather than alter engine tuning. You may notice minor changes in tone if the new pipe has a different internal volume or routing, but it isn’t intended to boost horsepower. For performance alterations, consider complete exhaust or intake modifications with appropriate tuning.

• Designed for restoration of proper exhaust routing and backpressure
• Possible slight change in exhaust tone, not a performance upgrade
• Not a replacement for tuned performance headers or mufflers

Who is this for: This KANECJDL exhaust header pipe is for owners and technicians maintaining small engines—generators, pressure washers, mini-bikes and compact equipment—who need a durable, direct-fit replacement for Predator 301cc/420cc engines or Hond* GX240/GX270/GX390-style heads. It suits DIY mechanics and repair shops seeking a cost-effective part that includes the necessary gasket and screws for a quick repair.