bobsp16 Site Supporter Jan 3, 2007 #1 can somebody tell me or find out if the 21b st head has the same size valva's as the ma12 31b or are thay bigger..
can somebody tell me or find out if the 21b st head has the same size valva's as the ma12 31b or are thay bigger..
Ed Fusion Motorsport MSC Founder Official MSC Trader Jan 3, 2007 #2 The bores are smaller so chances of them being bigger are not likely, remember they are only 66mm bore.
The bores are smaller so chances of them being bigger are not likely, remember they are only 66mm bore.
