Downpipes & Best Practices

[el mágico]

Running spool 3” race lowers w/ awe touring exhaust - no pop, no drone & no rasp. This setup is quieter than my M/T stock exhaust with the A/T muffler delete mod. It is a tick louder at WOT with a nice tone.

Also, with the A/T muffler delete mod i picked up a bunch of resonant frequency buzzing noises during light acceleration. All disappeared with the spool / awe combo.

Nice. Driving enjoyment in this car has a lot to do with exhaust note. Dial it in and you'll never wanna put her away!

 

[thesilverbullet]

Do you happened to know who still offers a 2.5"? I've checked Spool, B6a, and AMS but it seems as though most people are only making the 3" version now.

I was thinking B6a.. didn’t realize they dropped the 2.5” version - maybe call them to see if they will make a set….

Otherwise you can mount 3” lowers with a 3” - 2.5” adapters..

 

[thesilverbullet]

AMS does offer a 2.5" adapter on their offerings. They are also the most expensive option.

It’s a standard 2 bolt flange - so any 3-2.5” adapter will work - maybe can use a good quality 3-2.5” gasket.

 

[thesilverbullet]

Nice. Driving enjoyment in this car has a lot to do with exhaust note. Dial it in and you'll never wanna put her away!

I’m pleasantly surprised with the spool / awe combo. Nice tone, no drone all with good flow & hp.

 

[thesilverbullet]

Do you happened to know who still offers a 2.5"? I've checked Spool, B6a, and AMS but it seems as though most people are only making the 3" version now.

Looks like Mo-Powa still offers 2.5..

https://mo-powaperformance.com/collections/nissan-z-rz34-2023

 

[KrackaC8]

Looks like Mo-Powa still offers 2.5..

https://mo-powaperformance.com/collections/nissan-z-rz34-2023

I was just about to link these, you beat me to it! These are what B6A used to sell as their 2.5" LDPs.

They're on eBay for cheaper:
https://www.ebay.com/itm/1869572966...sImageDedupe_BP&tu=01KVEKB3JCQ75EZ6KP4R95HTR9

 

[trajiiic]

yooooo, thanks guys! added to cart.

 

[kevinbonds]

Hey everyone, I've read about 2/3 of this thread from the start and haven't come across an answer to my specific question. I want to ask if there's anything I need to keep in mind when using any LDP with and aftermarket Y-pipe (ISR/Z1/PLM) where it's 2.5" to 3" collector. I currently have the ISR single axle back

No, don't need to do anything special. I have 3 inch Boosted 6 LDP to a Megan Racing 2.5 y-pipe, the supplied gaskets work fine, don't overthink it.

 

[trajiiic]

No, don't need to do anything special. I have 3 inch Boosted 6 LDP to a Megan Racing 2.5 y-pipe, the supplied gaskets work fine, don't overthink it.

Thanks man, I appreciate the wisdom!