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      08-14-2021, 09:08 PM   #37
Drew415
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Drives: '21 BMW M2 Comp
Join Date: Dec 2020
Location: Bay Area, CA

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Quote:
Originally Posted by No_curebimmer View Post
Quote:
Originally Posted by Nicname View Post
Did it help fix any issues you've had before with the equal length? Maybe welding is the way to go instead of clamping
Yes…my initial thoughts given my drive back home from the shop:

- sound/tone is significantly deeper; feels like it dropped a few octaves, entire RPM range
- encountered no raspiness from 1500-2000 RPM (like I did w/ AA EL only)
- grumbles more, feels like it wants to burble, but not quite
- cold starts are about same as before.
- has a more noticeable 'braap' on up shifting/letting off throttle
- as expected, efficient is very manageable, would be perfect for a long hwy drive. No drone
- from a loudness POV, sport is about as loud as Sport+ w/ AA EL only. No drone, zero raspiness throughout several throttle blipping sessions
- sport+ is perfect when you want to be a hooligan! Zero raspiness found, but occasional drone (few tries ~3k (ish), 3rd gear, doing 60mph).
- the difference between Efficient/Sport is now more noticeable …the deeper growl is clearly evident/heard.
- sport growl level 7 vs sport + growl level 10

Glorious upgrade- super happy!!
sound clips pls
Appreciate 0