ORIGINAL: MetallicaJunkie
ORIGINAL: plaurence
Can anyone tell me how O.S. labels their mufflers? I have two that say 744 with different bolt patterns.
The 744 came out in 1970's or so and was used on the 60/61 FSR line of engines, which had a bolt on muffler...then sometime in the mid 80s they came out with the SF (61)l.. that 61 used the same 744 muffler but has a bolt through pattern