i had the comps in my truck and wow, way to much fuel on the top end for my poor hx35. street manners as long as u stay below half-3/4 throttle, it seemed to smoke less than the stock 175 dvs did. but wot, there was no chance of clearing them up, and would choke my turbo to where boost would drop 20psi after it maxed out at 54, would drop immediately to mid to low 30's