I tried them on e85 car and couldn't clear not ready cats and heaters and then my friend tried them on non e85 car and worked.
Its seems to be hit and miss but i was told that 90 elbows works better.
All parts from 07 mustang.
One set of Cervini hood louvers (heat extractors) pick up at Carlisle two years ago..these were proatypes 100.00 plus 15.00 shipping. These have a sharper angle compared to AM style.
Riechard AC delete 8 rib adjustable 150.00 new 350. Shipping 15.00
Mil...
Brand new Ford Pro Cal tool and air filter for 2011-2014 225.00 shipped. Friend bought a 2014 gt and then order a track key with boss exhaust. Sold car and never used ford tuner instead used a SCT on car.