I questioned what I remembered and went digging through old mags. I was wrong, sort of. The April 2003 vol. 16, no.4 of Muscle Mustang & Fast Fords was the issue the artical was in. The Mufflers they used in the test were Dynomax Ultra-Flos. The numbers on the dyno were 237 rwhp & 273 ft. lbs. with stock. 230 rwhp & 340 ft. lbs. with the Dynomax. That is a 67 ft. lb difference. The guy writing the artical had to buy everyone lunch that day because he was the only one betting that the stock muffs. wasn't hurting performance. I like the logistics smiliey,
