Don't have any knowledge other than disecting the picture. Looks like he runs the exhaust under the oilpan, better pray for no oil leaks. Why he would run draw thru on a fuel injected setup is beyond me; no intercooler, and not as efficient because you're trying to compress both air and fuel. Personally I think a better setup would be to mount the tbi on the log downstream from the blower. Not to mention he runs the exhaust exiting the blower back under the motor again!