Dezibel - Difference in stock and Mack Cat Back
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Senior Member
Joined: Dec 2004
Posts: 348
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From: Hannover, Germany
Dezibel - Difference in stock and Mack Cat Back
Hello !
You know the TÜV in germany makes the rules for our street legal cars.
With my stock exhaust !!!! STOCK !!!! The said it is to loud so my dealer puts some adapters on the tips to bring the sound to the ground. This was only for the TÜV to legalize my Lightning for german streets.
She was a little bit quieter with this "negative" mod.
The TÜV writes 91 Dezibel sound by standing to the papers of my Lightning. (EDIT: only allowed because it´s a truck and not a car)
After I got her from the dealer and after TÜV i put my MAC CAT Back on her....
Today we´ve checked the sound in numbers:
Same method as TÜV ---- 3600 rpm - hold -- than food away from pedal (in neutral gear)
Result: 105 Dezibel
Full throttle result in neutral gear: 119 Dezibel ( I love everyone of them )
You know the TÜV in germany makes the rules for our street legal cars.
With my stock exhaust !!!! STOCK !!!! The said it is to loud so my dealer puts some adapters on the tips to bring the sound to the ground. This was only for the TÜV to legalize my Lightning for german streets.
She was a little bit quieter with this "negative" mod.
The TÜV writes 91 Dezibel sound by standing to the papers of my Lightning. (EDIT: only allowed because it´s a truck and not a car)
After I got her from the dealer and after TÜV i put my MAC CAT Back on her....
Today we´ve checked the sound in numbers:
Same method as TÜV ---- 3600 rpm - hold -- than food away from pedal (in neutral gear)
Result: 105 Dezibel
Full throttle result in neutral gear: 119 Dezibel ( I love everyone of them )
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Joined: Jan 2003
Posts: 5,097
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From: DETROIT, (formerly Eaton County, Michigan)
MAC Cat back?
That is what I have. I really really like the tone of it. The exhaust does not sound like Cherry bomb exhaust (glasspack exhaust)
I'm not sure how loud it is, as I have hi-flow catalytic convertors and Bassani headers, so I cannot give an accurate reading.
That is what I have. I really really like the tone of it. The exhaust does not sound like Cherry bomb exhaust (glasspack exhaust)
I'm not sure how loud it is, as I have hi-flow catalytic convertors and Bassani headers, so I cannot give an accurate reading.
Thread Starter
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Senior Member
Joined: Dec 2004
Posts: 348
Likes: 0
From: Hannover, Germany
Originally Posted by l-menace
MAC Cat back?
That is what I have. I really really like the tone of it. The exhaust does not sound like Cherry bomb exhaust (glasspack exhaust)
I'm not sure how loud it is, as I have hi-flow catalytic convertors and Bassani headers, so I cannot give an accurate reading.
That is what I have. I really really like the tone of it. The exhaust does not sound like Cherry bomb exhaust (glasspack exhaust)
I'm not sure how loud it is, as I have hi-flow catalytic convertors and Bassani headers, so I cannot give an accurate reading.
OHhh i wrote Mack
I mean MAC .......