Solo Mach Balanced + HFC--- Sound? - Pontiac G8 Forum: G8 Forums - G8Board.com
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post #1 of 11 (permalink) Old 07-22-2010, 09:08 AM Thread Starter
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Solo Mach Balanced + HFC--- Sound?

Would I notice a difference compared to the stock exhaust during cruising and light acceleration?


G8 GXP M6
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post #2 of 11 (permalink) Old 07-22-2010, 10:07 AM
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Yes there would be a difference. It will be noticable. The corners of your lips will curl upwards.

Darryn
2009.5 G8GT Blue
Its stock I swear
Dyno: 317hp 335tq
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post #3 of 11 (permalink) Old 07-22-2010, 10:21 AM
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The HFC's are what add ~15% additional sound.

Just the mach balanced, it will be 'quiet' at highway speeds, but during acceleration and city driving, you'll definitely notice that "its not stock".

Why not stop by here
and see if you can arrange to ride along with a local-to-you solo customer who has it installed. Then you can get a real-world feel for what it'll sound like and feel like, if you decide to get it on your car.

do NOT depend on youtube videos, they do not do any exhaust system justice!

Good luck!


2009.1 ZEPCOM MGM G8 GT
Kooks LT's, SOLO HFC & Mach Unbalanced with J-pipes, SLP Tips.
Livernois tune, VCM, FE3's, full Holden blue gauges conversion, iphone on display. Daily Driver FTW
The ZEPCOM G8 was SOLO's test mule
www.youtube.com/zepcom

Bought 3/30/2009, retired 7/18/2017 at 136k miles, still strong. Been a great ride, she will be missed!
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post #4 of 11 (permalink) Old 07-22-2010, 01:09 PM Thread Starter
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Thanks for the feedback.

I am looking for more sound but only under load. I like the stock quietness when cruising or slow accel.



Quote:
Originally Posted by zepcom View Post
The HFC's are what add ~15% additional sound.

Just the mach balanced, it will be 'quiet' at highway speeds, but during acceleration and city driving, you'll definitely notice that "its not stock".

Why not stop by here
and see if you can arrange to ride along with a local-to-you solo customer who has it installed. Then you can get a real-world feel for what it'll sound like and feel like, if you decide to get it on your car.

do NOT depend on youtube videos, they do not do any exhaust system justice!

Good luck!
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post #5 of 11 (permalink) Old 07-22-2010, 01:19 PM
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Then you will probably be better off with a catback WITHOUT aftermarket cats.

Too much sound for you with aftermarket cats. Look into v2+J. Drone free and the quietest that they offer, without cats.

Or try the washer mod, lol


2009.1 ZEPCOM MGM G8 GT
Kooks LT's, SOLO HFC & Mach Unbalanced with J-pipes, SLP Tips.
Livernois tune, VCM, FE3's, full Holden blue gauges conversion, iphone on display. Daily Driver FTW
The ZEPCOM G8 was SOLO's test mule
www.youtube.com/zepcom

Bought 3/30/2009, retired 7/18/2017 at 136k miles, still strong. Been a great ride, she will be missed!
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post #6 of 11 (permalink) Old 07-22-2010, 01:24 PM Thread Starter
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I guess I will have to live with the sound as I want the performance of the HFC. Just want to find a muffler set up with a good balance of performance/quality and quiet.
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post #7 of 11 (permalink) Old 07-22-2010, 02:16 PM
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Sir you are looking for HFcats by themselves. Delete the pup cats if you got them. Leave the rest stock. That is what I have done to my GT. I wish I had the GXP mufflers. To get the added sound that you will already have.

Darryn
2009.5 G8GT Blue
Its stock I swear
Dyno: 317hp 335tq
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post #8 of 11 (permalink) Old 08-02-2010, 03:37 PM
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Quote:
Originally Posted by Darryn View Post
Sir you are looking for HFcats by themselves. Delete the pup cats if you got them. Leave the rest stock. That is what I have done to my GT. I wish I had the GXP mufflers. To get the added sound that you will already have.
Has this been done and did it cause any CELs on stock tune? I'd like to do this but don't want to do a tune, yet...

'09 Silver GT
Mods to date: 93 octane, Rotofab CAI, Holden trunk liner & matching Holden umbrella
Mods short-term: spare tire kit, radiator cover
Mods long-term: exhaust, tune
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post #9 of 11 (permalink) Old 08-02-2010, 03:51 PM
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Quote:
Originally Posted by phoenixitc View Post
Has this been done and did it cause any CELs on stock tune? I'd like to do this but don't want to do a tune, yet...

I don't think those cats are monitored by o2 sensors, only the upstream ones.

2009 LR G8 GXP M6 - Sunroof & Oynx Interior
Solo Mach exhaust w/HF Cats and resonators

Vararam & HSRK
VMS Ported Intake
Tuned by Vector Motorsports
BMR front/rear sway bars
MGW Shifter
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post #10 of 11 (permalink) Old 08-02-2010, 06:49 PM
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Quote:
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I don't think those cats are monitored by o2 sensors, only the upstream ones.
Correct, I'm referring to the cats at the manifold, not pup cats. I have an '09, not 09.5.

'09 Silver GT
Mods to date: 93 octane, Rotofab CAI, Holden trunk liner & matching Holden umbrella
Mods short-term: spare tire kit, radiator cover
Mods long-term: exhaust, tune
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post #11 of 11 (permalink) Old 08-30-2010, 01:06 AM
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Quote:
Originally Posted by phoenixitc View Post
Correct, I'm referring to the cats at the manifold, not pup cats. I have an '09, not 09.5.
I have the 09 (not 09.5) and I have the pup cats. There must be some builds that got the exhaust change before the bluetooth was introduced.

I'm also looking for a way to get the performance gains without making it too loud, but then who am I kidding? I am putting Kooks 1 7/8 mid-length catted headers on, but am waiting to get enough pocket change to order the Mach-Balanced. I wan to put them on with a tune at one time.

Black 09 G8 GT, Premium and Sport Packages
Mods: VMS Tune, Kooks 1 7/8" Mids, Solo Mach Balanced w/3.5" tips, Vibrant 12" Resonators, Roto-Fab CAI w/HSRK, BP Catch Can, Lowered on Eibach's, Radiator Cover, GXP Diffuser, CTS-V front & rear brakes, Matte Gunmetal 20" Nurburgring, Michelin Pilot Super Sport 255/35 - 295/30, MaverickMan Carbon Spoiler and Grille Surrounds.
Dyno: 337HP 349TQ
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