GT4 exhaust + X pipe for a 4.7 V8V
#1
10-23-2018, 05:08 PM
Join Date: Feb 2012
Location: Orange County, CA
Posts: 384
Rep Power: 29 
GT4 exhaust + X pipe for a 4.7 V8V
Is anybody running a combination of the GT4 exhaust (or muffler delete) + a Fabspeed X pipe (or any X pipe) on a 4.7 V8V? I'm starting to plan out my build and wanted to have our race shop make a titanium X pipe + muffler delete for my 2009 AM V8V 4.7. After researching on here, it sounds like the GT4 exhaust (or muffler delete) is not much louder than the Fuse 22 bypass and then the X pipe actually quiets the noise down slightly but makes for a more exotic tone. I have no plans to swap out cats at this point.
Last edited by FR500GT; 10-23-2018 at 06:08 PM.
#2
10-23-2018, 05:18 PM
Is anybody running a combination of the GT4 exhaust (or muffler delete) + a Fabspeed X pipe (or any X pipe) on a 4.7 V8V? I'm starting to plan out my build and wanted to have our race shop make a titanium X pipe + muffler delete for my 2009 AM V8V 4.7. After researching on here, it sounds like the GT4 exhaust (or muffler delete) is not much louder than the Fuse 22 bypass and then the X pipe actually quiets the noise down slightly but makes for a more exotic tone. I believe doing titanium over SS will help give it a slightly higher pitch as well no? I have no plans to swap out cats at this point as I know they are part of the factory headers. Any and all help is appreciated.
Just a heads up- titanium is just lighter than steel. Acoustically, they're the same.
#3
10-23-2018, 05:32 PM
Your catalyst is not part of the headers, 2009 is still serviceable. Pulling fuse #22 is child's play in sound compared to no muffler. Have them delete the muffler and go from there. Stainless over titanium, PIPE is pipe. Fab with the cheap stuff, finish with the nice stuff.
#4
10-23-2018, 05:34 PM
Your catalyst is not part of the headers, 2009 is still serviceable. Pulling fuse #22 is child's play in sound compared to no muffler. Have them delete the muffler and go from there. Stainless over titanium, PIPE is pipe. Fab with the cheap stuff, finish with the nice stuff.
#5
10-23-2018, 05:36 PM
Join Date: Feb 2012
Location: Orange County, CA
Posts: 384
Rep Power: 29 Your catalyst is not part of the headers, 2009 is still serviceable. Pulling fuse #22 is child's play in sound compared to no muffler. Have them delete the muffler and go from there. Stainless over titanium, PIPE is pipe. Fab with the cheap stuff, finish with the nice stuff.
#6
10-23-2018, 05:44 PM
The majority of sound-tuning (and this is a huge part of car dev) is done via baffles of different sorts; those baffles (inside the muffler) absorb the exhaust notes coming from the engine; the tricky part being to let through the wanted frequencies and adsorb the unwanted ones (like cabin "drone").
Often this is accomplished via rubber/plastic resonators that are mounted near things that make the unwanted frequencies.
Last edited by bolteon; 10-23-2018 at 06:03 PM.
#7
10-23-2018, 06:33 PM
Is anybody running a combination of the GT4 exhaust (or muffler delete) + a Fabspeed X pipe (or any X pipe) on a 4.7 V8V? I'm starting to plan out my build and wanted to have our race shop make a titanium X pipe + muffler delete for my 2009 AM V8V 4.7. After researching on here, it sounds like the GT4 exhaust (or muffler delete) is not much louder than the Fuse 22 bypass and then the X pipe actually quiets the noise down slightly but makes for a more exotic tone. I have no plans to swap out cats at this point.
I actually have. My set up was RSC cats with AP velocity X pipe and AP velocity muffler delete.
I put the stock muffler with valves disconnected back recently.
Its pretty loud but not that bad I would say. Around the same as a Gt3 with center exhaust delete.
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#8
10-23-2018, 11:38 PM
Join Date: Feb 2012
Location: Orange County, CA
Posts: 384
Rep Power: 29 Thanks for the input. Any videos with this setup?
#12
10-30-2018, 01:54 PM
My other toy DD was a 1965 Fastback Mustang done up to the 9's. The cars name was Thunder, since the exhaust was full length headers, feeding into an x-pipe and flowmaster Super 40's with side dump (starting with a stroked 347ci V8).
This car is basically modern Thunder. ;-)
This car is basically modern Thunder. ;-)
#13
10-30-2018, 11:20 PM
Here is my previous Vantage with the GT4 SuperSport Exhaust (muffler delete)
Here is my current V8VS with the VelocityAP Secondary Cat Deletes, Aston Martin Sport Exhaust, and VelocityAP tune
https://bit.ly/2OdjNsN
I prefer my current setup over my previous
Here is my current V8VS with the VelocityAP Secondary Cat Deletes, Aston Martin Sport Exhaust, and VelocityAP tune
https://bit.ly/2OdjNsN
I prefer my current setup over my previous
Last edited by lilseevs; 10-30-2018 at 11:25 PM.
#14
10-30-2018, 11:54 PM
Here's a back to back, deeper tone and a decent amount louder. The best differences are under-load... for saving 66lbs, it's a great idea.
If you want crackle, you'll need a tune to splash some gas into the exhaust and that will get you there. Removing cats isn't really a great idea in my opinion, but each to their own.
If you want crackle, you'll need a tune to splash some gas into the exhaust and that will get you there. Removing cats isn't really a great idea in my opinion, but each to their own.
Last edited by bolteon; 10-30-2018 at 11:57 PM.
#15
10-31-2018, 07:53 AM
My issue with the gt4 muffler delete, is the sound drastically changes from the unique Aston exotic v8 to a more pure/raw v8 sound. I drove around with the gt4 muffler delete on my prior car for over a year, it was definitely loud and fun but the sound was not unique especially in the higher rpm ranges. When on the track, it sounded very similar to a couple of hellcats I was rolling with - which was the glass shattering moment for me to not pursue the same setup on my current V8VS