CadillacMC Posted February 18, 2015 Report Share Posted February 18, 2015 My 2006 DTS Luxury III has a deep oil leek K rail or oil pan. It needs to be torn down all the way to get this done. I hate to have them do this and not improve the horsepower. What is the difference between the std 275 HP Northstar and the Performance 290 HP Northstar. Is it the Cam, bigger Fuel ports ? I stopped putting speed parts on my cars in 1969. I will probably have my Cadillac dealer do it. My engine only has 70000. I never had any problems with my other Northstars. I will have all new gaskets etc installed as they build it back up. I intend to keep the car. I realize with front wheel drive much more than 325 hp could be problematic with torque steer. I had a 455 Toronado of course it probably had 200 hp in 1976. Any ideas? Thanks Mark Quote Link to comment Share on other sites More sharing options...
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