Compatible with engines with aluminum

but it’s a real heavyweight in protection

For steel 3-light dash cover

ratchet head width is just 29mm

vance hines 4 twin slash quiet baffle BS365 Compatible with engines with aluminumVance & Hines 4" Twin Slash Quiet Baffle DB Killer for Harley Davidson The Vance & Hines Quiet Baffle is a crucial accessory for riders who wish to tune the sound level of their motorcycles. It is an ideal solution for those who prefer a more subdued exhaust note without compromising the performance and style offered by Vance & Hines systems. Decreases sound levels by 3 to 5 dB. Features: Designed to fit: Vance & Hines Twin Slash 4" Touring Chrome