News: Kooks Shelby GT350 Exhaust Dyno

0 Kooks Shelby GT350 Exhaust Featured

Breathe Deep

Kooks unlocks the potential of the Voodoo 5.2-liter engine with full exhaust

By Steve Turner
Photos by Steve Turner and courtesy of Joe Charles

There is little doubt that the 5.2-liter Voodoo engine in the latest Shelby GT350 exhales with the best exhaust sound of any factory Mustang. This is especially true of the resonator-free R-model with its exhaust valves in the open position. Yet with all the airflow scurrying through the engine at 8,250 rpm, we had to wonder if long-tube headers and a freer-flowing exhaust would unleash even more power from this flat-plane-crank V-8.

True long-tube headers definitely help the Voodoo 5.2-liter engine breathe. Not only did peak horsepower improve by 24 horsepower, but the bottom-end torque really improved. This should give the GT350 the kind of around-town grunt it’s been missing.
True long-tube headers and a full exhaust definitely help the Voodoo 5.2-liter engine breathe. Not only did peak horsepower improve by more than 24 horsepower, but the bottom-end torque really picked up. This should give the GT350 the kind of around-town grunt it’s been missing.

Recently the exhaust experts at Kooks let out a teaser video of the company’s freshly minted 1 3/4- to 1 7/8-inch Step Headers, a pair of 3-inch Front Connection Pipes with Green Cats, and a 3-inch X-pipe mated to the factory axle-back and mufflers. They followed that up by rounding out the system with one of the company’s own axle-back systems featuring Kooks mufflers.

Now the dyno results from this upgrade have hit the Internet. You can watch Joe’s car run on the dyno at Roush Yates right here…

A video posted by Kooks Headers (@kooksheaders) on

For more details and a look at the dyno sheet, check out the thread on our forum.

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