FFG F100 Coyote Swap H-Pipe Bulkhead Adapter Kit
FFG F100 Coyote Swap H-Pipe Bulkhead Adapter Kit
FFG F100 Coyote Swap H-Pipe Bulkhead Adapter Kit
FFG F100 Coyote Swap H-Pipe Bulkhead Adapter Kit

FFG F100 Coyote Swap H-Pipe Bulkhead Adapter Kit

$54.99

Coyote swap H-pipe bulkhead adapter kit for 1948–79 Ford trucks and 1966–79 Broncos, keeping coolant flowing to the passenger head with the heater off.

  • Keeps both heads at the same temperature - restores coolant flow to the passenger side head when the heater is off.
  • Stops the limp mode - the ECU protection event is a temperature imbalance; this removes the cause.
  • Billet aluminum; not a hose splice - CNC-machined from solid and bolted to the firewall where it can be serviced.
  • Two finishes - raw machined or black anodized depending on how the engine bay is going.
  • Buy the plumbing with it - the Premium kit is a full -08AN braided setup and the OEM+ kit is heater hose with every clamp and O-ring.
  • Proven in our own builds - we run an H-Pipe in every Coyote swap that leaves the shop.

Install Level: Moderate

Choose Adapter Only, Premium AN or OEM+ hose kit at checkout. Adapter Only includes no lines, fittings or clamps.

SKU: FFG-HPB.AD-R

⚠️
WARNING: Handling passenger or off-highway motor vehicle parts can expose you to chemicals such as phthalates and lead. Learn more.
FFG F100 Coyote Swap H-Pipe Bulkhead Adapter Kit
From $54.99

Finish the Build Right

Parts our crew pairs with this kit so your swap goes together right the first time.

1–2 of 3
  • 1973–1979 Ford Truck Supercharger Coolant Tank From $248.00 Details for 1973–1979 Ford Truck Supercharger Coolant Tank
  • Coyote Radiator Hose Adapter Upper - Complete Builder Kit $177.00 Details for Coyote Radiator Hose Adapter Upper - Complete Builder Kit
  • Coyote Swap Headers | 1988-96 OBS Ford Truck and Broncos From $2,174.99 Details for Coyote Swap Headers | 1988-96 OBS Ford Truck and Broncos

Overview
Specifications
Tech Resources
Compatibility

Keep Your Coyote Cool

Fat Fender Garage Coyote H-Pipe Bulkhead Adapter

Your Coyote swap runs perfect – until you turn off the heater and watch that passenger side head climb into the danger zone. We've seen it happen too many times. Coolant stops flowing where it needs to go, temperatures spike, and suddenly you're dealing with limp mode when you should be enjoying the drive.

Why Every Coyote Needs an H-Pipe

Here's the problem: when your heater's off, coolant flow to the passenger side head gets restricted. That head starts running hot while the other stays cool, and your ECU throws the truck into protection mode. Not exactly the performance you swapped in a Coyote for.

We've used H-Pipe solutions in every single Coyote swap we build because they work. This isn't just good practice – it's essential insurance for your engine's longevity.

Precision-Machined Solution

Our Billet Aluminum H-Pipe Bulkhead Adapter mounts directly to your truck's firewall with the precision fit you expect. CNC-machined from solid aluminum, available in raw machined or black anodized finish. This isn't a band-aid fix – it's engineered cooling flow that keeps both heads happy, heater on or off.

Three Ways to Build It Right

Premium Kit – The Complete Solution
Everything you need for a professional AN-line setup:
• Billet Aluminum H-Pipe Bulkhead Adapter (Raw or Black Anodized)
• Billet Aluminum -08AN Connector Fittings A & B (Black Anodized)
• 12' -08AN Black Braided Soft Line
• 2 Barb AN Fittings
• 4 Straight AN Fittings
• 4 90-Degree AN Fittings
• AN O-Ring Plug
• 6' Heater Hose
• 4 Worm Drive Hose Clamps
• All O-Rings and Hardware

OEM+ Kit – Clean and Reliable
Professional results with traditional heater hose connections:
• Billet Aluminum H-Pipe Bulkhead Adapter (Raw or Black Anodized)
• 2 90-Degree Heater Hose Connectors
• 15' Heater Hose
• 8 Worm Drive Hose Clamps
• 4 Barb AN Fittings
• 4 90-Degree AN Fittings
• AN O-Ring Plug
• All O-Rings and Hardware

Adapter Only – For Custom Builders
Just the precision-machined adapter for those building their own solution:
• Billet Aluminum H-Pipe Bulkhead Adapter (Raw or Black Anodized)

 

Fat Fender Garage part number FFG-HPB.AD-R (Raw Machined; adapter only)
Material: billet aluminum; CNC-machined from solid
Finishes: Raw Machined or Black Anodize
Mounting: bolts to the truck firewall
Premium kit line: 12 ft of -08AN black braided soft line
Premium kit fittings: billet -08AN connector fittings A and B (black anodize); 2 barb AN; 4 straight AN; 4 90-degree AN; AN O-ring plug
Premium kit hose and clamps: 6 ft heater hose; 4 worm drive hose clamps
OEM+ kit: 2 90-degree heater hose connectors; 15 ft heater hose; 8 worm drive hose clamps; 4 barb AN; 4 90-degree AN; AN O-ring plug
All O-rings and hardware included with both complete kits
Variant count 6 across two finishes and three kit levels
Listed price 54.99 USD for the Raw Machined adapter only
Installation manual published as a PDF

Installation Guide

Step-by-step instructions for this kit.

🔧 View Install Guide

Questions? Talk to the FFG Team

For fitment questions or build-specific guidance, the FFG team has you covered.

Email: info@fatfender.com

Call: (480) 621-6072

Tagged for 1948-52; 1953-56; 1957-60; 1961-66; 1967-72 and 1973-79 Ford Trucks plus 1966-77 and 1978-79 Ford Broncos running a Coyote swap.
The bulkhead adapter mounts to the firewall and plumbs the H-Pipe coolant loop for the Coyote engine.

SEARCH OUR STORE

Engines, A/C accessories, steering, brakes, & more. Get everything you need for your truck restoration at home.