09/15/2026
What are a Front and Rear Lightweight brake kit and 17" drag pack worth in the 1/4 mile on an F90 M5? We found out!
2018 F90 M5. Same tune. Same fuel. Only the brakes and drag pack changed—and it went 11.64 → 10.91. 🤯🤯
F90 crowd, this surprised us, so we’re sharing all six passes and the full footage.
FULL VIDEO HERE - https://youtu.be/xUqVwd-z3TE
All Dragy Videos, and Day 1 and 2 videos attached
The car is otherwise stock apart from our silicone intake kit, BOV, Diff Lock Down, and BM3 Stage 1 ACN 91 tune. We ran it at the same location on two days, with three quarter-mile pulls per setup. We made zero changes between days except the VTT front and rear brake kit and the drag pack.
Day 1: Stock brakes, 20" HRE wheels, Michelin Pilot Sport 4s.
Day 2: VTT front and rear brakes, 305/45/17 Mickey Thompson ET Street Rs up front, and 28/10.5/17 Hoosier Drag Bracket Radials in the rear.
The brake kit took almost 100 lb out of the setup. The wheels and tires removed another 42 lb, all rotating mass. About 88 lbs of the roughly 142 lb total savings is rotating mass—approximately 62%.
The breakdown is 42 lb from wheels and tires, 26 lb from the front brakes, and about 20 lb from the rear brakes. The tire change also gave the car the traction the street setup was missing.
Day 1 — stock brakes / HRE 20s / Pilot Sport 4s
• No launch control: 11.70 @ 120.74 mph | 1.82 60 ft | 9.99 60–130
• Launch control, spun and bogged: 12.05 @ 120.63 mph | 2.10 60 ft | 9.85 60–130
• Launch control: 11.64 @ 121.91 mph | 1.96 60 ft | 9.61 60–130
Day 2 — VTT brakes / drag pack
• Launch control, car drifted and started the timer early: 11.43 @ 124.72 mph | 2.06 60 ft | 8.91 60–130
• Launch control: 11.13 @ 125.39 mph | 1.82 60 ft | 8.79 60–130
• Launch control: 10.91 @ 126.15 mph | 1.63 60 ft | 8.63 60–130
Best against best: 0.73 second quicker in the quarter-mile, 4.24 mph more trap speed, a 0.33-second improvement in the 60 ft, and 0.98 second quicker from 60–130.
Throw out each day’s slowest quarter-mile pass and average the other two: 11.67 @ 121.33 became 11.02 @ 125.77. Average 60–130 went 9.80 → 8.71.
The Day 1 12.05 spun and bogged. The first Day 2 pass drifted forward and started the timer early. Every pass is in the video with driver-seat footage and Dragy overlays.
Same 2018 F90 M5. Same Stage 1 ACN 91 tune. Only the brakes and drag pack changed between days. We expected an improvement; a 10.91 @ 126.15 was bigger than we expected. What’s your take?
For everyone asking about the setup, here’s the VTT F9X M5/M8 front + rear brake package we ran:
https://vargasturbo.com/product/vtt-f9x-m5-m8-ultimate-lightweight-front-rear-brake-package/