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Expert Answers about Oldsmobile


  • Difference Between Hopkins # HM41365 and Curt # C55355 Wiring Harness for 2003 Olds Slihouette
  • Both the Hopkins # HM41365 and the Curt # C55355 would be correct for your Silhouette. Both wiring harnesses have the same capacity, preform the same function and would install in the same manner. I recommend going with the Curt option as we've found the converter in this particular harness to hold up better over time than other options like the Hopkins harness above. I included a link to the instructions for both harnesses for you to take a look at.
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  • Comparing Trailer Hub and Drum Assembly # 8-173-16UC3 with # 8-276-5
  • Basically, an electric brake assembly is going to be a 7 x 1-1/4 inch while a hydraulic brake assembly will be a 7 x 1-3/4 inch. If you are using electric brakes on the trailer, go with Trailer Hub and Drum Assembly, # 8-173-16UC3. For hydraulic drum brakes, use Trailer Hub and Drum Assembly, # 8-276-5.
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  • Choosing Between MagnaFlow Exhausts MF15893 and MF15897 for 1967 Oldsmobile 442
  • The two MagnaFlow crossmember-back exhaust systems you referenced, parts # MF15893 and # MF15897, differ primarily in their cost and pipe diameter, as you noted. Both systems are 100-percent stainless-steel exhaust kits that include all hardware, straight-through mufflers and a true X crossover to balance airflow for improved power. I would stick with the 2-1/2-inch diameter kit # MF15893 unless you have the 4 barrel carb and are using a high-performance air filter. Air intake and exhaust...
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