Modified Mustangs & Fords
Installing A Performance Exhaust For A Ford Mustang - Exhausting The Possibilities
We Test The Power Potential Of Some Standard Exhaust Upgrades
When we compare these numbers with the baseline figures, there's no gain in horsepower and just a single lb-ft of torque. Since we know from experience the K-manifolds do produce some power, we can only conclude that our 2-inch tubing and quiet passenger-car mufflers are holding things back.
With the full-length headers in place, the numbers were as follows: