This is a custom manufactured mandrel-bent exhaust Y Pipe made here in the USA for all 1999 and some 2000 F250-F550 Excursion 2 and 4 wheel drive 6.8L V10 and 5.4L V8. It has two 2.5″ mandrel-bent pipes transitioning to 3″.
Ford’s factory y-pipe is formed and does not direct the exhaust and harmonic vibrations out which restricts the exhaust flow, forcing you to lose HP, torque and gas efficiency. The SPD’s collector utilizes the pulse vacuum that is generated.
Pulse Vacuum – By grouping primary exhaust tubes into a collector, the vacuum pulse from one cylinder can be used to create a vacuum on the other exhaust ports. This vacuum will cause the exhaust to begin flowing more quickly as the exhaust valve opens. The collector must be long enough and small enough to keep the inertia of the exhaust pulse optimized while keeping back-pressure low.
**For all 2000 models: Please check your truck to make sure it matches the factory y-pipe photo above. This y-pipe will not fit some of the 2000 models.**
Some of its benefits are:
- Its function is to free up the factory restricted exhaust connection, giving you more horsepower, torque, and gas efficiency. Our Y Pipe has two 2.5″ mandrel bent pipes transitioning to 3”. The factory Y Pipe downsizes to 1.5” inch pipes which restricts the exhaust flow, forcing you to lose HP, torque and gas efficiency.
- The dyno tests we performed show a gain of 33HP and 35 torque. This test was performed on a F-250 crew cab.
- You will get an extra 1-2 mpg.
- It is very easy to install. Just cut the old Y Pipe out and weld the new performance Y Pipe in. It comes with a coupler for easy install.
See below for install pictures: https://5startuning.com/wp-content/uploads/SD_99-00_Ypipe_Install_pics.pdf