I have a 91z28 with a 350 supercharged, tes headers, dual cat's, and 3in flowmaster cat back system. My best time was 12.8 in the 1/4. I recently posted my concerns of my flowmaster muffler stating that when i am reving it above 3500 rpm's, it sounds like an aircompressor is pushing air through a straw? I was told to change the muffler to a magna flow since it has a straight through desighn and this would solve the problem. However, This will cost just under 200 bills and for 450 i can get a 4in kit for my Z. Now, What should I do? I have been trying to save my cash for some AFR heads and unsure of what will benifit my Z28 the most overall?

 

Anybody ?????????????????? ?