tri-y headers in a 450sl - Mercedes-Benz Forum
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post #1 of 2 (permalink) Old 04-17-2007, 11:10 AM Thread Starter
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tri-y headers in a 450sl

Fellow listers,

I have a client with a '76 450sl. In an attempt to improve performance a bit, we are considering installing the tri-Y headers and downpipes from a 500slc and fabricating a custom exhaust (or modified 500slc exhaust) for the remainder. Both are m117 motors and as such I believe the 500slc headers will bolt right up to the heads. Given they are both 107 cars, there should be no issue with steering box clearance. What I do not know is if there a size difference with the exhaust ports that needs to be reconciled? Has anyone BTDT? Anything to be wary of? This car does not need to pass emissions so those issues are moot. FWIW, this is a former California spec car.

Thank you in advance.


Mathieu J. Cama
Old World Automotive
Vintage Mercedes Repair and Mechanical Restoration
Serving the Mercedes community since 1986
Lawrenceville, GA

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1961 Unimog 404S
1965 190c
1967 250s (for sale)
1970 280sl
1970 280se
1971 280se 5 speed
1978 280slc 4 speed
1982 280te
1982 300sd
1983 300sd
1983 240d 3.0 4 speed
1984 300d 5 speed (sold)
1985 500sel Euro w/ hydromat
1986 190e 2.3-16
1989 560sec AMG
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post #2 of 2 (permalink) Old 04-17-2007, 12:01 PM
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Do a search...there was a discussion on this previously I think.

I really doubt that the headers are going to provide much, if any, bang for the buck. In fact, they can hurt low-end torque...while admittedly gaining a bit at the top end.

But you probably knew that...

Current: 1989 300E
Past: 2001 SLK320, 2001 C320, 1979 450SL
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