STI Exhaust Part Number - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

warhawk03 · 02-23-2021, 08:39 PM

It appears that there are two different part numbers for the STI Performance Exhaust:

ST44300AS020
ST44300AS010

Is anyone familiar with the differences? I'm guessing it's related to the model changes from 2016 to 2017.

MrSkubi · 02-24-2021, 04:22 AM

ST44300AS020 was created to fit facelifted 2017+ models. The only difference should be midpipe to axleback connection angle and lenght.

JCC · 04-25-2021, 08:49 PM

Quote:

Originally Posted by MrSkubi

ST44300AS020 was created to fit facelifted 2017+ models. The only difference should be midpipe to axleback connection angle and lenght.

So I would need the ST44300AS010 for my 2016?

JCC · 04-25-2021, 08:53 PM

Looks like it..

https://www.nengun.com/sti/performance-muffler and https://www.sti.jp/en/parts/subarubr.../ST44300AS010/

nikitopo · 04-26-2021, 01:17 AM

Quote:

Originally Posted by JCC

So I would need the ST44300AS010 for my 2016?

Yes. Good choice by the way. I have the same and I am more than satisfied.

JCC · 05-06-2021, 12:18 AM

Quote:

Originally Posted by nikitopo

Yes. Good choice by the way. I have the same and I am more than satisfied.

Am on the lookout and hope to find it maybe second hand. Really like the look and the sound.

scion fr-s · 05-06-2021, 12:23 AM

Quote:

Originally Posted by JCC

Am on the lookout and hope to find it maybe second hand. Really like the look and the sound.

Going to be a long journey. Good luck finding one.

nikitopo · 05-06-2021, 01:57 AM

Yes I agree. These ones have a dual structure with a tubular pre-silencer and main silencer arranged in parallel front to back. It is a quite unique design and build quality is similar to jewelry. I would say that they will come a classic and hard to find part. We won't see such a design again. New STI exhaust for the '22 cars will be just a plain silencer.

Dirty Harry · 05-08-2021, 09:39 AM

Quote:

Originally Posted by JCC

Am on the lookout and hope to find it maybe second hand. Really like the look and the sound.

Keep an eye out on eBay. I got mine from a Subaru dealership advertising clearance stock. Once I saw the seller was in my local area I phoned them direct and he knocked $250 off. Advertised at AU $1300, got it for $1050 and the dealer fitted it for $100, so $1150 overall. Very happy with it, sounds and looks great IMO and not too OTT sound wise.

Dirty Harry · 05-08-2021, 09:55 AM

.

nikitopo · 05-08-2021, 10:53 AM

STI exhaust

Dirty Harry · 05-08-2021, 11:32 AM

Quote:

Originally Posted by nikitopo

STI exhaust

Well done. Looks clean, I always wondered how my car would look debadged.

Dirty Harry · 05-10-2021, 01:21 AM

I’ve always assumed this part is pretty much cosmetic. It does state on the STI website:

“This high-performance muffler boasts low back pressure and an approximately 13% lower airflow resistance compared to the standard models.”

Does anyone know if there is an actual performance gain, if any? Just more out of curiosity. I have had the part for nearly 3 years now and haven’t noticed any performance improvements.

churchx · 05-10-2021, 03:00 AM

Most probably as with other catbacks, small if any, mostly done for sound. I see no reasons for miracle to happen and STI's being any different.

02-23-2021, 08:39 PM	#1
warhawk03 Member Join Date: Mar 2016 Drives: 2018 BRZ Location: Wisconsin Posts: 30 Thanks: 17 Thanked 8 Times in 6 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	STI Exhaust Part Number It appears that there are two different part numbers for the STI Performance Exhaust: ST44300AS020 ST44300AS010 Is anyone familiar with the differences? I'm guessing it's related to the model changes from 2016 to 2017.

05-08-2021, 09:55 AM	#10
Dirty Harry Senior Member Join Date: Apr 2019 Drives: 2013 BRZ Satin White Pearl Location: Melbourne, Australia Posts: 636 Thanks: 584 Thanked 674 Times in 331 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	. Attached Images

05-08-2021, 10:53 AM	#11
nikitopo Senior Member Join Date: Mar 2014 Drives: '15 BRZ RA Location: Greece Posts: 3,787 Thanks: 2,417 Thanked 1,944 Times in 1,261 Posts Mentioned: 29 Post(s) Tagged: 0 Thread(s)	STI exhaust Attached Images

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02-24-2021, 04:22 AM	#2
MrSkubi Senior Member Join Date: Nov 2017 Drives: 17 BRZ ,21 GR Yaris, 23 GR86 Location: Poland Posts: 155 Thanks: 397 Thanked 137 Times in 79 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	ST44300AS020 was created to fit facelifted 2017+ models. The only difference should be midpipe to axleback connection angle and lenght.

04-25-2021, 08:53 PM	#4
JCC Member Join Date: Feb 2020 Drives: 2016 ice silver metallic Location: US Posts: 77 Thanks: 47 Thanked 16 Times in 12 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Looks like it.. https://www.nengun.com/sti/performance-muffler and https://www.sti.jp/en/parts/subarubr.../ST44300AS010/

05-06-2021, 01:57 AM	#8
nikitopo Senior Member Join Date: Mar 2014 Drives: '15 BRZ RA Location: Greece Posts: 3,787 Thanks: 2,417 Thanked 1,944 Times in 1,261 Posts Mentioned: 29 Post(s) Tagged: 0 Thread(s)	Yes I agree. These ones have a dual structure with a tubular pre-silencer and main silencer arranged in parallel front to back. It is a quite unique design and build quality is similar to jewelry. I would say that they will come a classic and hard to find part. We won't see such a design again. New STI exhaust for the '22 cars will be just a plain silencer.

05-10-2021, 01:21 AM	#13
Dirty Harry Senior Member Join Date: Apr 2019 Drives: 2013 BRZ Satin White Pearl Location: Melbourne, Australia Posts: 636 Thanks: 584 Thanked 674 Times in 331 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	I’ve always assumed this part is pretty much cosmetic. It does state on the STI website: “This high-performance muffler boasts low back pressure and an approximately 13% lower airflow resistance compared to the standard models.” Does anyone know if there is an actual performance gain, if any? Just more out of curiosity. I have had the part for nearly 3 years now and haven’t noticed any performance improvements.

05-10-2021, 03:00 AM	#14
churchx Senior Member Join Date: Mar 2015 Drives: 2014 GT86 Location: Latvia, Riga Posts: 4,333 Thanks: 696 Thanked 2,086 Times in 1,436 Posts Mentioned: 53 Post(s) Tagged: 1 Thread(s)	Most probably as with other catbacks, small if any, mostly done for sound. I see no reasons for miracle to happen and STI's being any different.

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