Anyone straight pipe their exhaust?

[docron]

As I prepare to install GRP HF DP and I am kinda underwhelmed with the exhaust note being too soft despite having GRP Ti exhaust as well keeping the valve always open, has anyone custom fabricated a straight Y pipe from DP to tips yet?

Coming from the 4C where I had an aggressive but not obnoxious Magnaflow exhaust without drone, I am yearning for a more aggressive exhaust note.

Rather than responses like "why would you want louder? " Or "OEM exhaust sounds fine..." etc., I want it louder and OEM exhaust sounds weak which is why I am asking this question. and yes, I know the potential implications of decreased back pressure without a muffler and all that crazy twisty exhaust piping but ECU should adapt right?

Seems like an easy fabrication...Y pipe from DP-midpipe connection to tips in the rear bumper with hangers. Would you go 3" full Ti or stainless?

 

[FST]

Do

As I prepare to install GRP HF DP and I am kinda underwhelmed with the exhaust note being too soft despite having GRP Ti exhaust as well keeping the valve always open, has anyone custom fabricated a straight Y pipe from DP to tips yet?

Coming from the 4C where I had an aggressive but not obnoxious Magnaflow exhaust without drone, I am yearning for a more aggressive exhaust note.

Rather than responses like "why would you want louder? " Or "OEM exhaust sounds fine..." etc., I want it louder and OEM exhaust sounds weak which is why I am asking this question. and yes, I know the potential implications of decreased back pressure without a muffler and all that crazy twisty exhaust piping but ECU should adapt right?

Seems like an easy fabrication...Y pipe from DP-midpipe connection to tips in the rear bumper with hangers. Would you go 3" full Ti or stainless?

View attachment 66280

Do you have any drone in your ti setup?

 

[jp129]

Don't think we have anyone on this forum running a straight exhaust setup. You could try and let us know !

 

[docron]

Do

Do you have any drone in your ti setup?

Zero drone in GRP Ti setup. Almost EV like….

 

[F1 SML8R]

@docron Do it, do it, do it!

BTW, I had the dual exit Y Magnaflow on my 4c and the sound was indeed glorious. My only rub with it was the "Y" connector kept cracking even after being re-designed a couple of times, but it was all about the sound!

 

[Blackthought_]

Zero drone in GRP Ti setup. Almost EV like….

Is the GRP TI sound less aggressive that stock + decat + milltek controller?

 

[675430VME]

i4 straight pipe setup.
Btw, SS sounds so much better than Ti on the turbo, ask @Milk242 who had listened to both SS and Ti side by side. SS almost sounds like a V6.

 

[docron]

Is the GRP TI sound less aggressive that stock + decat + milltek controller?

I have i4 so I don't have third cat. But GRP Ti with miltek valve open is definitely more aggressive than stock. But I want more aggressive.

 

[docron]

Shouldn't be that difficult right? Pretty straight forward. And then just keep Miltek valve controller connected separately and tuck it up in the rear bumper to keep CANBUS satisfied.

 

[Milk242]

There was a post awhile back who did build a straight pipe exhaust for the i4. https://www.emiraforum.com/threads/built-a-custom-downpipe-and-exhaust-system-for-i4.5326/

 

[Milk242]

i4 straight pipe setup.
Btw, SS sounds so much better than Ti on the turbo, ask @Milk242 who had listened to both SS and Ti side by side. SS almost sounds like a V6.
View attachment 66295

Yea @675430VME exhaust did sound better than the others who had TI exhausts. It was actually fairly deep and very aggressive sounding.

 

[F1 SML8R]

There was a post awhile back who did build a straight pipe exhaust for the i4. https://www.emiraforum.com/threads/built-a-custom-downpipe-and-exhaust-system-for-i4.5326/

Except this version takes out the downpipe as well (i.e., this starts all the way up on the turbo). I think @docron was considering starting from the downpipe exit which is where all the aftermarket exhausts begin.

 

[675430VME]

 

[675430VME]

Except this version takes out the downpipe as well (i.e., this starts all the way up on the turbo). I think @docron was considering starting from the downpipe exit which is where all the aftermarket exhausts begin.

The track car from Lotus racing academy in China has a straight downpipe and exhaust. Trust me, your neighbor will hate you for it.

 

[Kaz]

The track car from Lotus racing academy in China has a straight downpipe and exhaust. Trust me, your neighbor will hate you for it.

He has no neighbors, very lucky lives in gigantic property! I also think the car needs to be waaaaay louder, our 4C's were almost a menace to society lol

 

[docron]

He has no neighbors, very lucky lives in gigantic property! I also think the car needs to be waaaaay louder, our 4C's were almost a menace to society lol

Benefit of living out in the rural countryside. lol