Hi All,
Im am in need of some advice on a custom exhaust system installed today on my 2007 M2 DE Genki 5-speed.
The exhaust specs are as follows:
- 2" mild steel press bent from the cat back
- resinator
- 4"x8.5"x13.5" straight through, glass packed oval muffler
- muffler has an internal 'dog leg' bend in it so it's a O/C inlet and outlet and is 2" internal.
- 3" dump tip.
The remainder of the engine remains stock.
The result I was after is a slight 'hum' over the OEM exhaust with a higher flow.
Definately nothing loud!!!! More of an OEM sound.
Unfortunately, on the drive home from the exhaust shop, it's way too loud for me.
The car is now has a drone at around 90Kp/h (55mp/h) and also a drone while coasting downhill in 4th gear.
Can anyone suggest what may be the issue here;
- the 2" piping (should I have stayed with the OE size of 1.75")
OR
- the design and/or size of muffler?
I had originally asked for a 6" round muffler with a 2" internal, but was only offered the above muffler when I arrived.
The above new exhaust specs were under the advice from the exhaust fabricator.
Please feel free to let me know any thoughts, advice and/or suggestions.
Thanks in advance.
Muz
Im am in need of some advice on a custom exhaust system installed today on my 2007 M2 DE Genki 5-speed.
The exhaust specs are as follows:
- 2" mild steel press bent from the cat back
- resinator
- 4"x8.5"x13.5" straight through, glass packed oval muffler
- muffler has an internal 'dog leg' bend in it so it's a O/C inlet and outlet and is 2" internal.
- 3" dump tip.
The remainder of the engine remains stock.
The result I was after is a slight 'hum' over the OEM exhaust with a higher flow.
Definately nothing loud!!!! More of an OEM sound.
Unfortunately, on the drive home from the exhaust shop, it's way too loud for me.
The car is now has a drone at around 90Kp/h (55mp/h) and also a drone while coasting downhill in 4th gear.
Can anyone suggest what may be the issue here;
- the 2" piping (should I have stayed with the OE size of 1.75")
OR
- the design and/or size of muffler?
I had originally asked for a 6" round muffler with a 2" internal, but was only offered the above muffler when I arrived.
The above new exhaust specs were under the advice from the exhaust fabricator.
Please feel free to let me know any thoughts, advice and/or suggestions.
Thanks in advance.
Muz