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Opeler
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Discussion Starter · #1 · (Edited)
Just something I noticed while doing some measurments for my new exhaust...
On the stock Opel exhaust manifold, the run from cylinders 1 and 4 are about 3" longer than on 2 and 3....so to compensate to make all the pipes the same length before collecting to one pipe they made one of the two down pipes 3" longer to make all 4 runs the same length......laughing...but they put the longer of the two down pipes on cyliners 1 and 4.
Now 1 and 4 are six inches longer than 2 and 3......One reason to upgrade to a new exhaust.

Steve
 
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