New Exhaust

[neosoul]

Hey Guys,

I recently posted this question in another forum and am trying to get some answers. I am replacing my exhaust system going duals, I already have the magnaflow cats kit #23453. I have decided to go with jones exhaust quiet tone dual mufflers, problem is they come in sizes from 18" to 29" inlet/outlet from 1.75 to 3". First question is what size mufflers and in/out should get for my 98 2 door tahoe and why does it matter. Someone please explain this to an automotive noob. Thanks in advance.

 

[SunlitComet]

match the exact size you have now. it a long thing to explain but it has an effect on gas scavenging and things of the sort that effect your power output.

 

[neosoul]

I'll go measure today, should I go with 2 1/2 or 3" in/out on my duals

 

[retorq]

For a true dual setup 2.5 inch is plenty for your truck, dual 2.5 exhaust into a single 3 inch muffler would probably be the best.

 

[neosoul]

Well i went out and measured my muffler and the case alone is 22 inches, talked to the company I'm ordering from and they suggested 2.25 to 2.5. in/out Retorq and Sunlit thanks for the replies, I will be going with the 2.5 in/out dual mufflers to go with my magnaflow high flow cats. For those of you that do have true duals on your 96-99 2 door tahoes how long is the casing on your mufflers. Just curious what people replaced their old muffler with.

 

[19Yukon97]

If you plan on keeping the 350 in the truck, then the 2.25-2.5 inch pipe will be just fine. I'm planning around a 383 swap in the future, so i went bigger. Mine being 3 inch before the muffler and 3.5 after the muffler. I dont have a true dual setup. But i have the flowmaster 50 series delta flow. I believe it is 17 inches long. It just depends on how loud you want your truck to be. Do you want it to be really loud? if so go with a 40 series from flowmaster. If you want it to be quieter then go with a 70 series. I know some put the magnaflow 22 inch muffler on their trucks, i had that for 3 months and i didnt like it personally. I really like my 50 series though!

 

[neosoul]

Yrah I'm going with 2.25 or 2.5 duals mufflers single i/o, I just want to say to those that responded, your advice was appreciated and pretty much inline with what the vendors I contacted recommended. I just needed another opinion to make sure I wasn't being taken for a ride. Thank you all I really enjoy reading this forum, so much knowledge to be absorbed.