dreadnaut:
1, cut the 180° right - 180° left combo
2(a), Nissan, Speedgate, any other non-PG cars: jump out of the first loop to the right and try to land preferably on the road (somewhere at the end of the boulevard), then
2(a1), Speedgate: if you use a fast car, try to make a bug jump by hitting the first cork from the right - if you have enough speed, you can land at the next cork
2(a2), Nissan, any slow car: jump out of the cork with hard steering to the left. If you are fast enough, you will land somewhere around the next cork.
2(b), Indy, Acura: reach powergear on the loop and cut the boulevard / first cork part
3, you mustn't slow down totally to solve the next two small corners, just slide
4, jump out of the next loop to the left. Landing angle is a crucial question, try to fall on the icy road (without sliding off). That one will be a bit hard.
5, if you have a slow car, you will need manual gears to complete the ramp on the hill. While you are falling, steer to the left to make another slide, keeping some speed for the pipe.
6, jump out at the end of the pipe - of course to the left. If you are lucky, you will land in the right corner.
7, after the boring banked corner part: make a long bug jump over the water using the cork up/down's outer left side (seems to be possible with Indy / Speedgate, or else with unbelievable luck / 3 hours RH)
The detailed Indy solution is not included, it's not my task to tell (check Alain's Eger replay on YouTube to see the limits of the car). If you can do at least 4 of these 7, you will be easily under 55 seconds (and probably beat me).