Here's an excerpt from the technical editors at Bimmer Magazine pulled directly from the current April 2008 magazine issue on my Dinan S1-Tuned
E60 5 Series:
"The exhaust note is powerful and muscular without being intrusive or loud. To call the sound magical doesn't really do it justice. Unlike many cars that combine an automatic with a free-flow exhaust, the Dinan S1-545i sounds like the two parts are actually working together rather than merely revealing each other's presence in a blatantly obvious way. There is no drone, no burble - just a nice, sonorous hum that reminds the driver of the power underfoot."
"Even with the automatic, the Dinan S1-545i is the sweetest E60 short of an M5 we've ever driven. It may not have the power of an M5, but it does have comparable handling and braking, two factors that are probably more important when it comes to everyday driving enjoyment. Two thumbs up!"
Not a bad critique overall!
BEST REGARDS ALL!
Fully loaded Dinan Signature S1 Tuned E60 545i Sports Sedan, featuring Dinan high flow intake system, Dinan free flow exhaust, Dinan high flow throttle body, Dinan Stage 3 engine management software, Dinan Stage 1 Suspension System, Dinan front camber plates, Dinan carbon fiber front & rear strut tower braces, Dinan (19") lightweight forged wheelset, Dinan/Brembo Gran Turismo (GT) slotted big brake system, Bridgestone Potenza RE050A RFT's