Truck sounds bad at higher rpm since header install

[Jedimind]

recently installed a set of long tube headers that goes back to a mufflex 14" magnaflow and my truck does not sound good when above 3000 rpm. Sound changes to a almost a v6 sound. exhaust is fully welded in and has no leaks. Idk if anyone has had the same issue or is this just what they sound like? I have recently changed the spark plugs and wondering if I could of possibly damaged a coil pack in the process and it's not working at higher rims but it's not throwing any codes. Any suggest would be appreciated. Thanks

 

[Ratket]

What size headers and what size exhaust? Is it y piped or or true duals?

 

[Jedimind]

1-3/4" jba & jba catless y-pipe

 

[Hipps2000]

MDS... are you running a tuner? If you are you can shut it down completely. When it kicks in makes the truck sound like ****. I hate it...

 

[NCRaineman]

Catless... you're going to need some kind of resonator on there to get the raspiness under control.

 

[Firebird]

Catless y pipes have a nasty sound to me. the higher up the RPM band you go, the worse a catless exhaust system seems to sound

 

[Jedimind]

Thanks for the feedback. I do have a custom tune with diablo i3 but made the same sound with it loaded and without. When I was Installing the headers i did notice that the mufflex was in pretty rough shape and probably due for a new muffler here soon maybe I will try adding in the resonators see if that helps.

 

[NCRaineman]

Thanks for the feedback. I do have a custom tune with diablo i3 but made the same sound with it loaded and without. When I was Installing the headers i did notice that the mufflex was in pretty rough shape and probably due for a new muffler here soon maybe I will try adding in the resonators see if that helps.

A few gearhead friends of mine have said that cheap cherrybomb glass packs make for good resonators.

 

[WilliamS]

Glasspacks make amazing resonators, they are cheap and readily available and will eliminate that horrible sound. Throw in a set and I promise you will like the outcome.

 

[Ramnewbie]

Go with a carven muffler, straight thru, no baffels. Pretty much a glorified glass pack.

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[Nick@GotExhaust]

Go with a carven muffler, straight thru, no baffels. Pretty much a glorified glass pack.

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This is exactly what I was going to say. I would add the carven progressive of competitor.

 

[Statcher1]

The resonators aren’t going to change the sound much if any at all. He has the exact same setup on exhaust that I do. And I ditched my factory resonators. Because they gave my exhaust a pinging sound.


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[RLJ10X]

If it was me, I'd either put the cats back in, or I'd do Borlas; or both.

I have cats + Borlas on my V6 Mustang, and and everyone says it sounds great.

There is an art to getting a vehicle to sound good. The 5.7 Hemi seems to be more forgiving than most.

V6s are a little tougher to get to sound good, and you may have to pay bit more. But anyone who says a V6 can't,or don't sound good, simply have not heard a well set up V six. My six sounds better than most v eights.

 

[NCRaineman]

V6s are a little tougher to get to sound good, and you may have to pay bit more. But anyone who says a V6 can't,or don't sound good, simply have not heard a well set up V six. My six sounds better than most v eights.

I had a '05 six cylinder 'stang with the tried and true 4.0L SOHC as a daily driver for a few years. I wanted better sound on a budget, had a bad cat that needed replacing and didn't want to cut the bumper for duals so I ended up going with Magnaflow high-flow cats and a single stock muffler from an '05 GT that I picked up off craigslist for a bargain. The combination was exceptional, many people heard the car and swore it was a V8. Definitely one of the best sounding sixes I've heard.

 

[VB712]

Catless with a magnaflow tends to get raspy in higher rpms.