PPP upgrade louder or quieter than a SS BackBox
Much much quieter off boost, small throttle openings and low revs - quieter on boost and high revs but with an entertaining whoosing/jet plane type noise

The sound of Mike's (RB170) RB5WR coming passed at high speed
is like a jet plane

Matt

The sound of Mike's (RB170) RB5WR coming passed at high speed
is like a jet plane

Matt
As above - quieter off boost, just a nice background burble when cruising. When giving it some... mMMmm... back windows down please

Anyone tried doing this through the Dartford Tunnel? Best thing about it

Richard

Anyone tried doing this through the Dartford Tunnel? Best thing about it

Richard
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