It looks like a blue head vspec with a gold colored speed II head on it. IDK why you guys cant get the gallons out of your OS engines. I have a speed engine that has 7.5 gallons on it, tons of compression and still pulls my truggy around like its nothing. It must be the tuner or the fuel, thats the only thing I can come up with. OS engines are the easiest engines that I have ever tuned all you have to do is get it close and they run strong and then on thaqt day with you get it dead on 100% perfect they flat scream...