SOUL

Soul Performance Products · 03-20-2020, 03:53 PM

Here is the @Street Speed 717 Corvette C8 with prototype SOUL HJS HD 200 cell catalytic converters and aggressive non-valved rear exhaust! We’ve unleashed the V8 roar without check engine lights while shedding 32 lbs. Loud outside, refined inside! We’re now working towards production and expediting heat shielding solutions.

We had one week with this development car which required all hands on deck and rapid prototyping. The valved exhaust is rather free flowing with valves open, and we wanted to craft an aggressive non-valved solution. This prototype is a split bank crossover design offering maximum flow and V8 rumble while shedding 20 lbs. This prototype retains use of slightly modified factory exhaust heat shields. We've heard rumors of GM discussing potential issues related to heat from modifying the exhausts with dealers and are taking every precaution to implement heat shielding into every solution.

The factory catalysts are the major choke point in the exhaust, and we use HJS HD 200 cell catalytic converters for their industry renowned quality and effectiveness at increasing flow without triggering a check engine light. A brazing stripe around HD cores prevents cat from being knocked loose from exhaust pulses while the triple metal matrix is designed around durability. HJS uses a premium wash coat abundant in precious metals to effectively catalyze while encouraging far greater flow than factory cats. Expect no check engine lights or noxious fumes.

-Mike

euro* · 03-20-2020, 04:09 PM

I don't know about other factors, but those SOUL tips are 1000 times better than the OEM C8 exhaust tips

Soul Performance Products · 03-20-2020, 04:14 PM

Quote:

Originally Posted by euro*

I don't know about other factors, but those SOUL tips are 1000 times better than the OEM C8 exhaust tips

Thank you! We had limited time with this beauty, but we'll be sure to craft a few more options from stainless and titanium for the final result.

-Mike

N54Yankee · 03-20-2020, 04:44 PM

That sounds bad ass! Under throttle it sounds remarkably similar to listening to the C6R and C7R cars live roar by at Watkins Glen. Sounds better then my C6 with LG tubes, uncatted, NPP.

Now I’m sure you’re on the stock tune, how does the car run from idle to top end and everything in between?

Soul Performance Products · 03-20-2020, 05:08 PM

Quote:

Originally Posted by N54Yankee

That sounds bad ass! Under throttle it sounds remarkably similar to listening to the C6R and C7R cars live roar by at Watkins Glen. Sounds better then my C6 with LG tubes, uncatted, NPP.

Now I’m sure you’re on the stock tune, how does the car run from idle to top end and everything in between?

Thank you! It feels very strong and has a great urgency to it. I guess the way to explain it is that it feels like how tight and responsive your car feels after a tune - but out of the gate. Great low end torque. We only put a few miles on it but it feels very well composed and you feel like you're at the heart of a machine in typical Corvette fashion.

-Mike

N54Yankee · 03-20-2020, 05:35 PM

Just out of curiosity as I’ll likely keep the exhaust I currently have but do you make for the C6? Don’t recall hearing the company name.

ntg44 · 03-20-2020, 06:24 PM

Idk if it's the engine or the exhaust, but this kinda sounds chainsaw-y to me. The Magnaflow system in TJ Hunt's video sounds better to my ears, cringey as he is.

No disrespect intended, I think Soul has some pretty awesome sounding systems for other cars. This is just giving me a vibe like the more recent turbocharged german V8s have, where it's kinda just a bunch of rumbly noise. Sure is pretty though.

No Boost · 03-20-2020, 06:42 PM

I'm quite familiar with that stretch of highway

These guys know their R&D shit, guys.

dgoldenz · 03-20-2020, 08:28 PM

Damn that sounds good. Sign me up. No idea wtf GM was thinking with those terrible looking square exhaust tips.

gatorfast · 03-20-2020, 08:45 PM

Not a fan of the sound but the tips looks great, much better than stock.

El Conquistador · 03-20-2020, 09:15 PM

Exhaust sounds WIP

1960 VW Beetle < 911 < E46 M3 < Wet Fart < B58 < S56 < Ford flat crank < Anything Aston Martin < 500 Abarth

Funf6cyl · 03-21-2020, 08:50 AM

Quote:

Originally Posted by gatorfast

Not a fan of the sound but the tips looks great, much better than stock.

Agreed. Not appeasing. Hard to call that good when NA cars like the GT3, Huracan, GT350 exist. IMO my 991.2S or T turbo also still sounds better.

5.M0NSTER · 03-21-2020, 11:45 AM

It's got the Porsche WHOOOOSH to it when shifting. I like it. It is a bit raspy though.

Soul Performance Products · 03-23-2020, 10:19 AM

Thanks for the comments! We were asked to build an aggressive setup for Mike so this combination is on the extreme end of tone and volume. Choosing one exhaust mod will yield a more refined result. The sport catalytic converters alone will pair well with the factory valved exhaust.

-Mike

c1pher · 03-23-2020, 10:46 AM

Can the tips just be swapped out for yours? Are the 4.5”?

I did this with my 718 to get a double exit vs single outlet and really liked it. I didn’t want to change the sound, but definitely wanted to change the look.

Soul Performance Products · 03-23-2020, 11:43 AM

At least on the valved exhaust the tips are welded on - as you can see in the pic below - unfortunately it would require a complete rear exhaust swap or modifying the factory exhaust.

-Mike

hellrotm · 03-23-2020, 04:29 PM

Quote:

Originally Posted by N54Yankee

Under throttle it sounds remarkably similar to listening to the C6R and C7R.

Exactly, C7R was the first thing that I thought of(0:22 in video).

Almost Identical deep tone.

TXSTYLE · 03-24-2020, 12:44 PM

Nice work. Sounds great! Perfect color too.

c1pher · 03-24-2020, 12:45 PM

Quote:

Originally Posted by Soul Performance Products

At least on the valved exhaust the tips are welded on - as you can see in the pic below - unfortunately it would require a complete rear exhaust swap or modifying the factory exhaust.

-Mike

I cry.

Soul Performance Products · 03-25-2020, 10:46 AM

Quote:

Originally Posted by c1pher

I cry.

Yeah - I don't think that was the best decision on their part.

-Mike

bvrider1 · 03-25-2020, 10:50 AM

+1

craftsmanship looks good though

Quote:

Originally Posted by Funf6cyl

Agreed. Not appeasing. Hard to call that good when NA cars like the GT3, Huracan, GT350 exist. IMO my 991.2S or T turbo also still sounds better.

c1pher · 03-25-2020, 11:40 AM

Quote:

Originally Posted by Soul Performance Products

Yeah - I don't think that was the best decision on their part.

-Mike

Well, I’m still status only 3000 so its not like I have a C8 yet. Who knows when the factory opens back either.

03-20-2020, 03:53 PM	#1
Soul Performance Products Banned 200 Rep 300 Posts Drives: F80 / 987.2 Cayman S Join Date: Oct 2017 Location: Willow Grove PA iTrader: (0)	SOUL \| Chevy C8 Corvette Exhaust Unleashed! Here is the @Street Speed 717 Corvette C8 with prototype SOUL HJS HD 200 cell catalytic converters and aggressive non-valved rear exhaust! We’ve unleashed the V8 roar without check engine lights while shedding 32 lbs. Loud outside, refined inside! We’re now working towards production and expediting heat shielding solutions. We had one week with this development car which required all hands on deck and rapid prototyping. The valved exhaust is rather free flowing with valves open, and we wanted to craft an aggressive non-valved solution. This prototype is a split bank crossover design offering maximum flow and V8 rumble while shedding 20 lbs. This prototype retains use of slightly modified factory exhaust heat shields. We've heard rumors of GM discussing potential issues related to heat from modifying the exhausts with dealers and are taking every precaution to implement heat shielding into every solution. The factory catalysts are the major choke point in the exhaust, and we use HJS HD 200 cell catalytic converters for their industry renowned quality and effectiveness at increasing flow without triggering a check engine light. A brazing stripe around HD cores prevents cat from being knocked loose from exhaust pulses while the triple metal matrix is designed around durability. HJS uses a premium wash coat abundant in precious metals to effectively catalyze while encouraging far greater flow than factory cats. Expect no check engine lights or noxious fumes. -Mike Last edited by Soul Performance Products; 03-20-2020 at 03:59 PM..
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03-20-2020, 04:09 PM	#2
euro* . 1669 Rep 1,536 Posts Drives: F90 M5 Join Date: Nov 2012 Location: Toronto, Canada iTrader: (8)	I don't know about other factors, but those SOUL tips are 1000 times better than the OEM C8 exhaust tips
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03-20-2020, 04:44 PM	#4
N54Yankee Lieutenant Colonel 2708 Rep 1,916 Posts Drives: N54 135\|Cobb\|M3 control arms Join Date: Sep 2018 Location: USA iTrader: (0)	That sounds bad ass! Under throttle it sounds remarkably similar to listening to the C6R and C7R cars live roar by at Watkins Glen. Sounds better then my C6 with LG tubes, uncatted, NPP. Now I’m sure you’re on the stock tune, how does the car run from idle to top end and everything in between? __________________ __________________ "The Constitution was never construed to authorize Congress to infringe the just liberty of the press, or the rights of conscience; or to prevent the people of the United States, who are peaceable citizens, from keeping their own arms.” Samuel Adams
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03-20-2020, 05:35 PM	#6
N54Yankee Lieutenant Colonel 2708 Rep 1,916 Posts Drives: N54 135\|Cobb\|M3 control arms Join Date: Sep 2018 Location: USA iTrader: (0)	Just out of curiosity as I’ll likely keep the exhaust I currently have but do you make for the C6? Don’t recall hearing the company name. __________________ __________________ "The Constitution was never construed to authorize Congress to infringe the just liberty of the press, or the rights of conscience; or to prevent the people of the United States, who are peaceable citizens, from keeping their own arms.” Samuel Adams
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03-20-2020, 06:24 PM	#7
ntg44 Colonel 2904 Rep 2,146 Posts Drives: R8 4.2 Spyder Join Date: Aug 2018 Location: Chicago iTrader: (3)	Idk if it's the engine or the exhaust, but this kinda sounds chainsaw-y to me. The Magnaflow system in TJ Hunt's video sounds better to my ears, cringey as he is. No disrespect intended, I think Soul has some pretty awesome sounding systems for other cars. This is just giving me a vibe like the more recent turbocharged german V8s have, where it's kinda just a bunch of rumbly noise. Sure is pretty though.
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03-20-2020, 06:42 PM	#8
No Boost enthusiasm > practicality 4043 Rep 2,245 Posts Drives: 987 CS \| G35x Join Date: Oct 2016 Location: Chester County, PA iTrader: (0) Garage List 2007 987.1 Cayman S [10.00] 2008 Infiniti G35x ... [0.00]	I'm quite familiar with that stretch of highway These guys know their R&D shit, guys. __________________ FSI 3.8L Stg II\|6MT\|SOUL\|IPD+GT3 TB\|Numeric Racing\|KW\|Tarett\|Rennline\|Raceseng\|APEX\|Recaro\|7.3 lb/hp VQ35HR\|5AT\|Stillen\|FI\|UpRev tune 8k rpm\|TransGo\|Hotchkis\|Whiteline\|H&R\|Z1\|Corbeau\|R1 Concepts\|10 lb/hp Left lane campers, GTFO!
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03-20-2020, 08:28 PM	#9
dgoldenz Lieutenant Colonel 2111 Rep 1,881 Posts Drives: Vanquish, FF, 392 Wrangler Join Date: Apr 2010 Location: Las Vegas iTrader: (1)	Damn that sounds good. Sign me up. No idea wtf GM was thinking with those terrible looking square exhaust tips.
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03-20-2020, 08:45 PM	#10
gatorfast Major General 5076 Rep 6,883 Posts Drives: 718 Cayman Join Date: Jan 2008 Location: SoFla iTrader: (4)	Not a fan of the sound but the tips looks great, much better than stock.
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03-20-2020, 09:15 PM	#11
El Conquistador Banned 341 Rep 571 Posts Drives: M240 Vert - 6M as god intended Join Date: Apr 2017 Location: Washington DC iTrader: (3)	Exhaust sounds WIP 1960 VW Beetle < 911 < E46 M3 < Wet Fart < B58 < S56 < Ford flat crank < Anything Aston Martin < 500 Abarth
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03-21-2020, 11:45 AM	#13
5.M0NSTER Lieutenant Colonel 3362 Rep 1,823 Posts Drives: 2018 Camaro SS 1LE Join Date: Dec 2018 Location: Back in Michigan, GO BLUE! iTrader: (0)	It's got the Porsche WHOOOOSH to it when shifting. I like it. It is a bit raspy though. __________________ 2017 BMW M2 German Spec 6MT, Driver's Package --> SOLD 2018 Camaro SS 1LE. Because race car! "Redline a day keeps the mechanics away"
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03-23-2020, 10:19 AM	#14
Soul Performance Products Banned 200 Rep 300 Posts Drives: F80 / 987.2 Cayman S Join Date: Oct 2017 Location: Willow Grove PA iTrader: (0)	Thanks for the comments! We were asked to build an aggressive setup for Mike so this combination is on the extreme end of tone and volume. Choosing one exhaust mod will yield a more refined result. The sport catalytic converters alone will pair well with the factory valved exhaust. -Mike
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03-23-2020, 10:46 AM	#15
c1pher Primo Generalissimo 5034 Rep 4,188 Posts Drives: All of them Join Date: Jun 2009 Location: DC area iTrader: (0) Garage List 2024 Ford Bronco Ra ... [10.00] 2018 Porsche 911 GTS [10.00] 2023 BMW M2 [9.25] 2022 Ford F-250 Tremor [8.50]	Can the tips just be swapped out for yours? Are the 4.5”? I did this with my 718 to get a double exit vs single outlet and really liked it. I didn’t want to change the sound, but definitely wanted to change the look.
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03-23-2020, 11:43 AM	#16
Soul Performance Products Banned 200 Rep 300 Posts Drives: F80 / 987.2 Cayman S Join Date: Oct 2017 Location: Willow Grove PA iTrader: (0)	At least on the valved exhaust the tips are welded on - as you can see in the pic below - unfortunately it would require a complete rear exhaust swap or modifying the factory exhaust. -Mike
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03-24-2020, 12:44 PM	#18
TXSTYLE "Salud" 14944 Rep 4,886 Posts Drives: F01 & F15 / Mineral White Join Date: May 2013 Location: The GYM! (The Burbs - N TX) iTrader: (0)	Nice work. Sounds great! Perfect color too.
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