Add up to 20 HP! For 1986-98 Mustangs, these H-pipes are mandrel-bent using aluminized 15-gauge tubing & include OE-quality, die-stamped flanges for a perfect fit.
2.5" H-Pipe with Converters (pictured)
Bolt on 15-18 horsepower
Uses 50-state EPA-legal converters
Less restrictive than factory 2.25" pipes
2.5" Off-Road H-Pipe
Bolt on 15-20 horsepower
For off-road and racing only (not emissions-legal)
Easy-to-install factory sensor and air pump fitting.
Note: These catalytic converters are no longer legal for sale in the state of California and will not be shipped to the state of California.
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