WOW no SOHC brains here. and you can git 200hp with $2000 in the D17A2. and the D15 is the weakest motor honda ever built sence 1987.Dont leave out the CCVC's very slow.trust me DON "PM me"and i'll show you where to look to git cheap power.90% of People on IA only use DOHC's cause they think bigger is better when their still driving a fourbanger.