This guy: http://myworld.ebay.com/ebaymotors/klasskollection/?_trksid=p4340.l2559 On ebay does custom made exhausts for various years of cars. He made my dual exhaust for my lesabre, mandrel bent. I get the impression he's got factory specs and builds the system off that. Despite not seeing my car or building it from the car mine fit pretty good. You could always send him a message and see if he can do it for your riv. He wasn't too expensive, imo.
Just got an email from the the seller. I assume it's mandrel as yours ,but will make sure. Aluminized steel without resonators: $320 + $60 shipping. We accept all major credit cards at 1-800-365-5764 Mon- Sat 8-8 EST or I can send a paypal invoice. If you prefer to purchase through ebay, use item # 230594921292. I believe you will be able to add the extra $40 when you pay. Include your auto application again & phone # for shipping info with payment. hanks, John So If I go through ebay it costs $40 more?????? Why would I do that instead uf calling in my order? One more question, I will be using shortie headers. Do I need to tell him anything specific about the mounting flange(?). I'd cal today and get this and my headers, but stuff is piling up for the car as it's still in the boooth waiting it's turn...