Possibly Silly Question on Exhaust Change

[Vipuronr]

For my '98 RT, considering changing the exhaust. Have read some people have only changed to hi-flow cats and kept the stock mufflers for less loud exhaust.

Question: How much do I lose in the change if I don't change the factory muffler (not a muffler delete car).

For me, its a combination of performance and sound.

Thoughts?

Peter

 

[CitySnake]

For my '98 RT, considering changing the exhaust. Have read some people have only changed to hi-flow cats and kept the stock mufflers for less loud exhaust.

Question: How much do I lose in the change if I don't change the factory muffler (not a muffler delete car).

For me, its a combination of performance and sound.

Thoughts?

Peter

By lose I presume you are speaking of HP. There is no loss. In fact there's likely a small gain of 5-10 HP (if you're N/A). If you want cooler side sills (and interior) and a bit more exhaust volume it's an excellent mod. It's also significantly less expensive than changing out the entire system (which you can always do later).

 

[PhoenixGTS]

They recently discussed this over on the Gen III board via DC Performance running a Gen IV car on the dyno with headers only. They got almost all the gain they would have gotten with a whole system but kept the car quieter. Having a noisy car and not liking it, I have to say this sounds like a good idea.

 

[BullRider]

I'm running stock exhaust with Random Tech Hi-flow cats. One of the best mods that I did. Swapping them out was quick and easy, but I spent a bit more and got them welded at a professional exhaust shop instead of just clamped.

The volume increased only slightly, but its a more throaty, mean sound. Side sills are enormously cooler than stock. I don't know that I picked up any huge performance increase with the cats, but the sound difference makes the car feel more powerful.

 

[Vipuronr]

Okay, I know this is personal opinion, but is one hi-flow cat better than another? I know there is Corsa, Random Tech and Roe Performance...but with the stock muffler, will one work better than another. By work, I mean the least restriction and the best sound....I know, more silly questions, but have to ask!

I would rather go in stages, so if I do not like the car without the change in muffler, I will change that at a later date. It isn't my preference to have a "loud" car, but I do think the stock exhaust is too quiet...quieter than any Vette I've owned.

Are there any videos of cars that only changed cats on Youtube?

Thanks much.

Peter