hey guys just wondering if anyone knows how much hp my 400 would push with the hpd trailmod kit?

 

According to their site, 56 or 57 HP at the crankshaft. It will wake up your 400 more than you can imagine. HPD Dyno

 

i like the numbers on the race mod but i dont wanna have to run race fuel..if i got the trail mod could i add more to get more out of it?,and still use hightest gas?

 

There would be a few more things you could do like lighten the flywheel, etc. But, you could not go any higher with compression(than the trail mod) or yes, you would have to go to a high octane gas. You could also go with the 39mm PWK carb instead of boring the factory one to give a little more power.