try easy off "fume free" lemon scented oven cleaner.it works very well and gives the aluminum a nice factory finished look.i cleaned my edelbrock TR-1X tunnel ram with it and it looks great.the aluminum has a light dull gray finish to it after cleaning with oven cleaner. spray the intake with the oven cleaner getting it completely covered in the foam.let it sit now for a half hour then rinse with water and use a toothbrush in hard to reach areas.this process may need to be repeated twice but you'll be very happy with the results
