I cant really say if i noticed a difference, because i only drove the car for 40miles (with dead brakes!) home and into the garage, then fully rebuilt the engine 2ltr, 276 piper cam, head work, and manifold. But all that sure did add up, its a very nice strong motor, loads of torque!
the manifold sounds awsome, louder than at the tailpipe as i was running the 2 standard rear 8v boxes with a custom 65mm centre section!
all out of the car again now! abf hopefully running by the weekend!
cheers