Wehrli 98.5-02 Cummins 5.9L 3.5in Intake Horn & Driver Intercooler Pipe - Flat Black

1998.5-2002 5.9L Cummins High Flow 3.5” Intake Horn and Driver Side Intercooler Pipe Kit. Kit replaces the failure prone 3” plastic OEM intercooler pipe with a 3.5” heavy duty 14g Aluminum intercooler pipe and the OEM cast intake horn (which is necked down to less than 1.5” wide) with a full mandrel bent 3.5” elbow. The 3.5” elbow is welded to a CNC machined aluminum mounting flange (new hardware included), which perfectly matches the WCFab Intake Spacer Kit (WCF100338) for optimum airflow into the cylinder head. Our horn can be used with the OEM grid heater or other brand high-flow intake plates; however, the internal surfaces may not be as perfect of a match as our Billet Intake Spacer kit offers. The CNC machined flange has two incorporated 1/8” pipe thread ports for boost reference or other injectables, and an 8mm threaded port to accept the wire harness isolation clamp to support the OEM wire harness. The 3.5” High Flow Horn also has an incorporated threaded bung to fasten the oil dipstick tube securely. Connecting the Intercooler pipe to the intercooler, and Pipe to Horn, are supplied with high-quality 5 ply silicone boots and stainless steel t-bolt clamps. No need to reuse any worn-out or torn OEM boots or clamps. The Intake horn and Intercooler Pipe are rounded off with WCFab's high-quality powder coat finish in your color of choice.

Additional Information

Wehrli Custom Fab Intake Horn, 3.5in., and Driver IC Pipe, 1998.5-2002 Cummins 5.9L, Flat Black

Part Type

Intercooler Pipe

• 2x Optional 1/8" NPT Ports for Boost Pressure reading or Water Methanol Injection
• 3.5" High Flow Intake Horn & matching 3.5" Intercooler Pipe
• Custom Powder Coat Finish
• High Quality Aluminum Construction
• Intake Gasket & Mounting Hardware
• Made in USA
• Mounting points to retain factory oil dipstick location and wire harness routing
• NO Tuning required, bolt on!
• Silicone Boots & Stainless T-Bolt Clamps

Note on Vehicle Configuration

This listing includes the term "driver" or "passenger". Please note that this may refer to a region specific variation based on vehicle configuration (LHD/RHD) or regional preferences. Much of our database relates to US sourced products where "Driver" typically refers to the left-hand side in LHD vehicles, and "passenger" to the right. In RHD vehicles, this terminology is reversed. Review product details carefully for compatibility. Contact support if you have any questions. StreetFX may not accept returns for special order products.

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Reference Information