Re: Dinan Vs. Tri-Flo Exhaust (archive)

I did a side by side comparision of a '89 535iM w/ the quieter Tri-Flow(mine) and a '89 535iA w/ the Dinan exhaust idling and the Dinan exhaust was so much quieter that I couldn't hear it running over my exhaust. Both systems reduce back pressure but the results don't feel like much(IMHO). I love the sound of my Tri-flo exhaust especially when it opens up a 3600rpm, but I have been told the it can be intrusive during long ride.

Justin--RedFive
'89 535iM OneLap Car

Anyone have any quick comparative opinions on the Dinan exhaust vs. the BB Tri-Flo for my 540 6-speed? The archives search isn't working.

From an install/cost perspective,
The Tri-Flo is supposedly a bolt-on application, though I haven't seen app notes yet (nor any HP gain). It IS cheaper, by about $300 (considering Dinan's requires welding and I'd pay them for the install.) However, I live about 1 mile away from Dinan's headquarters and it could be done quickly by a shop I know and trust. If the Tri-Flo would require being put up on a lift (rather than just jack stands), I'm going to have to incur the labor expense either way.

TIA,
John
Sunnyvale, CA
'95 540
Dinan chipped, w/ cold-air induction tube
M5 star wheels
clear signals, '00 M5 shift knob
plans for a Koni adjustable suspension upgrade

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