whats the difference in the castings 241 243 853?
12-06-2005, 04:29 AM
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i just swaped my 853's out for stock 243's. and you have to buy coil brakets to mount the coils and get the center bolt valve covers cause the old perimiter style don't work. so it cost a couple extra bucks. but the 243's have bigger valves and ports . i felt a very nice gain all the way through the RPM's. and at low rpm's it is much smoother (this is with a cam by the way). i picked them up brand new, and dirt cheap on E-bay. worth every penny.
12-06-2005, 09:04 AM
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Originally Posted by transAm-98
i just swaped my 853's out for stock 243's. and you have to buy coil brakets to mount the coils and get the center bolt valve covers cause the old perimiter style don't work. so it cost a couple extra bucks. but the 243's have bigger valves and ports . i felt a very nice gain all the way through the RPM's. and at low rpm's it is much smoother (this is with a cam by the way). i picked them up brand new, and dirt cheap on E-bay. worth every penny.
