"giving a noticeable benefit"
Once the clutch is fully engaged, I'd lean toward negligible, not noticeable. I'd definitely spend the money on lighter wheels before this (same concept, but much more drastic benefit), but every little bit helps in the end.
2013 Focus SE 5M Daily Driver
2003 Mustang GT V8/Auto Wife's Daily
1986 Mustang GT V8/5M Toy
- Jody -