I assume this list will be helpful in the future and since I can not update the list in the old forums I'll re-post it here:

As mentioned before: All additions, corrections, and hints are more than welcome.
On some sets, I'm not 100% sure if they are in their original specs or whether I re-calibrated them to make them more useful. I would appreciate a note on this so I can correct the list.

The notation "10/8" means that the boosted value is 10, the regular maximum value is 8.

Street

• Follower-Set(8/6 Popular, 8/8 Pure)

Drift

• Skill-Set(14/14 Slippery, 10/8 Hothead) 2x
• Nitro-Set(14/14 Slippery, 10/8 Hothead)

Drag

• Loot-Set(unknown, available on 2021-07-07)

Hypercar

• Nitro-Set(9/8 Pure, 11/10 Pump)
• Nitro-Set(9/8 Pure, 4/3 Frenetic)
• Follower-Set(8/6 Popular, 25.5/25.5 Lucky)

Rally Raid

• Nitro-Set(10/8 Drag Bump, 8/8 Rear Drag)
• Nitro-Set(9/8 Pure, 5/4 Ventilated)
• Nitro-Set(9/8 Pure, 11/10 Pump)
• Nitro-Set(10/8 Muddy, 5/4 Ventilated)
• Skill-Set(9/8 Pure, 12/10 Skilled)

Motocross

• Nitro-Set(9/8 Pure, 5/4 Ventilated) 2x
• Nitro-Set(10/8 Graceful, 10/8 Bender)

Rally Cross

• Nitro-Set(9/8 Pure, 11/10 Pump)
• Nitro-Set(9/8 Pure, 5/4 Drifty)
• Nitro-Set(4/3 Frenetic, 10/8 Shifty)

Hovercraft

• Nitro-Set(9/8 Pure, 4/4 Drifty) (I think this is not its normal configuration but a re-calibrated one - but I'm unsure about it)
• Reward-Sniffer-Set(12/10 Sensor, 10/8 Collector)

Aerobatics

• none

Demolition Derby

• Nitro-Set(9/8 Pure, 5/4 Ventilated)

Jet Sprint

• none

Monster Truck

• Nitro-Set(9/8 Pure, 11/10 Pump)

Power Boat

• Nitro-Set(9/8 Pure, 11/10 Pump)
• Nitro-Set(4.5/3 Rich, 8/8 Pure)

Touring Car

• Follower-Set(8/6 Popular, 11/10 Pump)
• Nitro-Set(9/8 Pure, 11/10 Pump)
• Nitro-Set(9/8 Pure, 10/10 Pump)
• Nitro-Set(10/8 Shifty, 10/8 Drag Bump)

Air Race

• Nitro-Set(7/6 Perfectionist, 6/4 Gateway)
• Nitro-Set(9/8 Pure, 6/4 Gateway)
• Reward-Sniffer-Set(Sensor, Collector), first three parts available on 2021-06-30, second part not announced, yet)

Alpha GP

• Skill-Set(10/8 Shifty, 10/8 Drag Bump)
• Nitro-Set(9/8 Pure, 4/3 Frenetic)

Furthermore, we got some half sets from repeated summits which I did not list.

The Skill-Set for Drift cars had a value of 10/14 for Slippery and 10/8 for Hothead. I know this, because I've seen it before.

And Hovercrafts had a boosted Nitro Chemist-Set that contained 9/8 Pure and 5/4 Ventilated.

In both cases, they are very much useless.

Thanks for re-posting this.

@brady2827

Thanks a lot, but this stupid new forum does not allow me to modify the original post:

"Error You are only allowed to edit posts for 10 minute(s) after posting"

Update 2021-07-01:

Changes:

• AR live sniffer set
• Correction on Drift skill-set default values (thx to @brady2827)
• Correction on Hovercraft NOS-Set (once again thx to @brady2827)

As mentioned before: All additions, corrections, and hints are more than welcome.
On some sets, I'm not 100% sure if they are in their original specs or whether I re-calibrated them to make them more useful. I would appreciate a note on this so I can correct the list.

The notation "10/8" means that the boosted value is 10, the regular maximum value is 8.

Street

• Follower-Set(8/6 Popular, 8/8 Pure)

Drift

• Skill-Set(10/14 Slippery, 10/8 Hothead) 2x (you should fully upgrade "slippery)
• Nitro-Set(14/14 Slippery, 10/8 Hothead)

Drag

• Loot-Set(unknown, available on 2021-07-07)

Hypercar

• Nitro-Set(9/8 Pure, 11/10 Pump)
• Nitro-Set(9/8 Pure, 4/3 Frenetic)
• Follower-Set(8/6 Popular, 25.5/25.5 Lucky)

Rally Raid

• Nitro-Set(10/8 Drag Bump, 8/8 Rear Drag)
• Nitro-Set(9/8 Pure, 5/4 Ventilated)
• Nitro-Set(9/8 Pure, 11/10 Pump)
• Nitro-Set(10/8 Muddy, 5/4 Ventilated)
• Skill-Set(9/8 Pure, 12/10 Skilled)

Motocross

• Nitro-Set(9/8 Pure, 5/4 Ventilated) 2x
• Nitro-Set(10/8 Graceful, 10/8 Bender)

Rally Cross

• Nitro-Set(9/8 Pure, 11/10 Pump)
• Nitro-Set(9/8 Pure, 5/4 Drifty)
• Nitro-Set(4/3 Frenetic, 10/8 Shifty)

Hovercraft

• Nitro-Set(9/8 Pure, 5/4 Ventilated) (Ventilated should be re-calibrated to "Drifty")
• Reward-Sniffer-Set(12/10 Sensor, 10/8 Collector)

Aerobatics

• none

Demolition Derby

• Nitro-Set(9/8 Pure, 5/4 Ventilated)

Jet Sprint

• none

Monster Truck

• Nitro-Set(9/8 Pure, 11/10 Pump)

Power Boat

• Nitro-Set(9/8 Pure, 11/10 Pump)
• Nitro-Set(4.5/3 Rich, 8/8 Pure)

Touring Car

• Follower-Set(8/6 Popular, 11/10 Pump)
• Nitro-Set(9/8 Pure, 11/10 Pump)
• Nitro-Set(9/8 Pure, 10/10 Pump)
• Nitro-Set(10/8 Shifty, 10/8 Drag Bump)

Air Race

• Nitro-Set(7/6 Perfectionist, 6/4 Gateway)
• Nitro-Set(9/8 Pure, 6/4 Gateway)
• Reward-Sniffer-Set(12/10 Sensor, 10/8 Collector)

Alpha GP

• Skill-Set(10/8 Shifty, 10/8 Drag Bump)
• Nitro-Set(9/8 Pure, 4/3 Frenetic)

Furthermore, we got some half sets from repeated summits which I did not list.

Update (Additions) 2021-07-07:

Drag

• Loot-Set(25.5/25.5 Lucky, 8/6 Goldfinder)

Touring Car

• Nitro-Set(unknown, available 2021-08-04 (Summit Reward))

Air Race

• Nitro-Set(unknown, available 2021-07-14 (Summit Reward))

There are two additional sets in the new motorpass, so if someone was crazy enough to buy it immediately I would appreciate information on whether those are boosted or not.

I just figured out that the APG-Motorpass-Set (Follower, Popular, Rich) is a regular maxed one and not boosted.

Update (Addition) 2021-07-14:

Alpha GP

• Nitro-Set(9/8 Pure, 11/10 Pump)

The TC set is a

Touring Car

• Nitro-Set(9/8 Pure, 11/10 Pump)

@obu42

And we got a

Hypercar

• Follower-Set(8/6 Popular, 4.5/3 Rich)

@obu42

And now we have a

Drift

• Nitro-Set(16/14 Slippery, 10/8 Hothead)

Which I really don't like because before, we had 3x the chance to get "the best" set, and now there is only one best set (this one).

@obu42 this really worries me, for two reasons:

1. It's only awarded to those who finished with a platinum score.
2. The boosted slippery set now means people - particularly world record holders - can now get a much, much higher score than before, meaning all other potentially great players without the boosted set will be unable to WR a drift event.

I myself do not know what exact pro settings the WR holders are using for the Drift events, and even if I did, I don't think I can ever WR any drift event. And that's sad.

@obu42

Today we got the first half of

Rally Raid

• Skill-Set(12/10 Skilled, 10/8 Muddy)

@obu42

and now a

Demolition Derby

• Nitro-Set(9/8 Pure, 4/3 Frenetic)

@obu42

Addition (complete next week):

Rally Raid

• Loot-Set(8/6 Goldfinder, 25.5/25.5 Lucky)

I would have preferred Lucky to be boosted, but well...

@obu42

Addition (complete in two weeks - why???)

Monster Truck

• Nitro-Set(10/8 Grace, 12/10 Gifted)

@obu42 sry can i ask u wich summit was for the nitro boosted set (pure frenetic) of the alpha gp?

@dantes_inferia

this one:
https://discussions.ubisoft.com/topic/100139/this-week-in-tc2-july-6?lang=en-US

@obu42

Addition:

Street Race

• Nitro-Set(9/8 Pure, 4.5/3 Rich)

And I can only ask WHY? WHY? WHY? Worst design decision since quite a while. First of all, the "rich" part is pointless - everyone will re-roll it to a maxed "pump" affix. And then we will have one set which outperforms all others. Up until now, chances were the same for everyone in Street category and no boosted sets gave an advantage - now we have one perfect set which we have to move from one car to the next.

@obu42 I don't agree with you on this, i think rich, specially for newest players could be a big difference in a long-term racing farming method. Particularly, i liked this set, but, i think this should be that magnet bonus set type.