2 1/4" x 9"
2 3/8"× 17"
4" collector 13.4" long. In retrospect I should've went with a 4 1/2" colle tor.

Also, after engine shop spec d a 1250 Dominator, I spoke with BRE and sent them my 1150 Dominator for modification. Bob Book thinks that will work better. With the new 1250 QF, peak tq was 690 @ 6800-6900, peak hp was 947 @ 7400-7500, which Bob and others think should be further apart.