Warranty is somewhat subjective. Theoretically, it can only affect the warranty if it can be proved that the modification was instrumental in causing the failure that you are trying to get covered by warranty. In reality, your relationship with the service department is what matters the most. As your service manager. If he has no issue with your mod, then you should enjoy many years of happy motoring with your warranty fully intact.
hey i got a quick question i got a 2011 dodge ram and i got 5 year bumber to bumber warrenty if i take out the muffler and just stright pipe it and keep the resonators is that gonna screw with me warrenty at all