Doug Thorley Headers have been the cream of the performance exhaust crop since 1958
Custom-made for your vehicle from durable 14-gauge steel tubing for longevity and a precise fit
Doug Thorley Headers are available for your vehicle in one of three header styles:
Tri-Y Headers: Doug Thorley Tri-Y Headers feature unique engineering that properly matches your firing sequence, freeing your engine from the strain of pushing exhaust gasses. Provides power from idle through 4500 RPM
Shortie Headers: The easiest Doug Thorley Headers to install, these custom models are made short to fit limited space vehicles. Special care is taken to preserve emissions mounting positions for smog legality
Long Pipe Headers: For power in the mid to high RPM ranges, Doug Thorley Long Pipe Headers are tuned to deliver. They're the ideal pick for high-horsepower street vehicles
Doug Thorley Headers utilize a polished nickel chrome finish or a heavy-duty metallic ceramic coating that reduces under hood temperatures
Because Doug Thorley Headers are made to stringent 50 state smog law standards, all headers are available with the necessary smog equipment and mounting spots
Doug Thorley Headers include a model-specific gasket for a leak-free fit
Each model includes all necessary O2 sensor bosses for factory sensors
Your Doug Thorley Headers carry a Lifetime Warranty for the original owner
It was the late 1950s, during the golden era of hot rods, when Doug Thorley crafted his plans for the highest quality headers on the block. Fine tuning, superior craftsmanship and unmatched attention to detail helped Doug Thorley Headers power street racers everywhere.
Now 50 years later, Doug Thorley Headers are built with the same mission in mind: amping-up the power of your street ride. Thorley Headers use one of three souped-up designs: a unique Tri-Y setup that roars from idle up to 4500 RPM; shortie headers for ease of installation and smog compliance; and long tube headers that specialize in mid to high RPM power.
Because they're setup for the streets, Thorley Headers also feature the hardware and custom flanging to be 50-state smog legal. Each header includes a sharp nickel chrome finish that's polished to a sweet gleam, or a metallic ceramic coating that withstands high heat. And, your Doug Thorley Headers carry a Lifetime Warranty for the original owner.
*It's a proven, indisputable fact: Dollar for dollar, no other investment will increase power and performance like a set of Doug Thorley Headers!
The proof is in the dyno! Our FJ Cruiser gained 18hp and 26ft. lbs. of torque!
NOTE: This is for off-road use only!
DRIVE: 2WD & 4WD
PRIMARY/COLLECTOR: 1 1/2" - 2 1/4"