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Original Message
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RE: 390 Exhaust with fins? |
By BobSprowl - 09/11/2002 7:49:25 AM; IP 152.1.160.205 |
Some F100 and F250 trucks in the '70s had the fins. I beleive they were added to prevent the exhuast manifolds from cracking. I never heard of one with fins doing this but the plain ones often do. |
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