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Does anyone know a website where I can purchase new front coil springs? I drive a 1998 DeVille Concours. I recently replaced the rear coils, and the air shocks. --I installed the Arnott airshocks, they are awesome! I looked all over the internet for the coils, but couldn't find them. I...

This is just a shot in the dark.... Did you also replace your deck? When I had my new audio & video system installed, the installers broke a ground wire, and set off the built in Cadillac security. The security was flashing, and the car wouldn't start. It could be something that simple...

Rear Air Shocks Hi. I have a '98 Concours. I just installed the Arnott rear air shocks. While I was in there, I also found that I had two busted coil springs, and replaced those too. The Arnott's bolted right in, no problems, and work great. I'd definitely reccomend them. Just follow the...

ALBUNDY: That's a great thread! Rocket obviously knows cars inside and out. I agree with what he wrote, word for word! I did see the 80mm MAF, and an 80mm Throttle body, but the ads stated that they were for the 2000 and up northstars. It looked like the MAF would bolt right up, but...

Yes, the turbonator/tornado is a scam, for people that really don't know any better. As far as modifying the intake system, the K & N picks up all the dirt and grime that is thrown at it. When you install them, or clean them, there is a pink oil you spray it with. If you think about it...

I own a 1998 Deville Concours. There's not too many go-fast goodies out there for us, so check this out if you want a better sound from under the hood, more power, and ( I suppose ) better mileage. 1. Remove the factory airbox top, and cut out all the baffles. I did this with a dremel...

Oh Yeah! LEDS-set me up!!! Yeah, that's a great idea!! I have been researching the 'net extensively, trying to find these for my 1998 Cadillac DeVille Concours.....but they are just not out there. I started researching on how to make them myself recently. If you guys are going to make...

Hi there, i've just purchased a 98 Deville Concours, and already put a K&N panel filter in it, and cut the baffles out of the airbox. This added some power, and some sound. I am wondering if anybody has found an aftermarket mass air sensor for the V8 Northstar? I see RSM has an 80mm throttle...