SS Exhaust Differences

[LT1der]

Know it's been asked a million times, but couldn't find it when I searched. Can someone tell me the exact difference between the exhaust system on the SS vs. a regular Z-28? I know the SS is supposed to be less restrictive and worth around 10 more HP, but what are the specs that make it flow better?

Thanks,
Dave

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Dave "Vegatex" English
<'02 Sebring Silver/Ebony Leather Z-28 A4; T-tops, 3.23 gears, ASR.
Mods: Spectacle SFC's/STB, FIPK, de-screened MAF, red calipers, leather shift boot.
96 LT1-powered '76 Vega Wagon, Howell Engine Developments Computer and Harness, Sanderson CC-13HO headers, Be Cool aluminum rad w/dual 11" SPALS, custom cold air induction, 700r4, Modified 7.5" 10 bolt w/Torsen rear diff, 28-spline Moser Custom Alloy axles, 3.42 rear, '98 Camaro rear disks, cross-drilled and slotted S-10 front disks. 2800 pounds of fuel-injected Whoop-Ass!>
http://h-body.org/people/projects/building_lt1/index.html

[UnbelievabLS1]

The base SS exhaust just has a freer flowing muffler, and different tips. Whereas the optionl Dual/Dual, is a completely new exhaust. It has a 3" intermediate pipe, the free flowing muffler, and bigger tailpipes.

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Brian Patterson 00' Onyx Black SS M6

Mods: free mods, Direct-Flo w/K+N, cutout, Pro 5.0, Harlan Shift Light, Ram 6130/402 Combo, Mcleod Adj. MC w/drill mod, newly rebuilt T-56 w/updated slave, and some shiny, reflective stickers!

Best Time: 12.6 @112 on a 2.00 60'


Member of MTFBA (Middle Tennessee F-Body Association)

[mmoceri]

Yep, Unbelievable's got it right. The optional SLP stainless exhaust, is available in dual/duals, or as 2 rectangular shaped tips, in the center of an add on, they put on the rear bumper. The center mount is only a cosmetic mod. They both give a 10 hp boost, over the staock SS exhaust.

Check with others on here. Some are running other aftermarket exhausts, they like beter. I got the SLP version, just because it could be ordered that way and may add value,,,,way down the road. Who knows, just my choice.

Good luck
Mark

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2002 SS, Coupe, M6, with Hurst Shifter, SLP Dual/Dual Exhaust, Bilstein Suspension, SLP Ram Air Box, Granatelli tuned MAF, Holley Powershot, Nitto Drag Radials, Rally Red, T-Tops, Black Leather, SLP SS Grill & 5 Spoke Chrome SS Wheels

[LT1der]

Are the pipes larger diameter on an SS vs. a Z-28, or is it just a less restrictive muffler on the SS?

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Dave "Vegatex" English
<'02 Sebring Silver/Ebony Leather Z-28 A4; T-tops, 3.23 gears, ASR.
Mods: Spectacle SFC's/STB, FIPK, de-screened MAF, red calipers, leather shift boot.
96 LT1-powered '76 Vega Wagon, Howell Engine Developments Computer and Harness, Sanderson CC-13HO headers, Be Cool aluminum rad w/dual 11" SPALS, custom cold air induction, 700r4, Modified 7.5" 10 bolt w/Torsen rear diff, 28-spline Moser Custom Alloy axles, 3.42 rear, '98 Camaro rear disks, cross-drilled and slotted S-10 front disks. 2800 pounds of fuel-injected Whoop-Ass!>
http://h-body.org/people/projects/building_lt1/index.html

[gillbot]

From what I have seen, the Z28 is 2.5" pipe, the SS is 2.75", and most aftermarket are 3" to 4"

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2002 Camaro Z/28 LS1 A4 (2.73's)
Sunset Orange Metallic
Fernco, SLP Airlid, K&N Filter
-----------------------
1995 Ford Aspire M5
!Torque & !Power

[UnbelievabLS1]

The standard SS is 2.75", whereas the optional exhaust for the SS is 3".

[95TealLT1]

The stock Z28 pipe is 2.75 inches not 2.5.

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2001 Z28 Camaro w/A4
Navy blue, chrome wheels, t-tops, leather seats, CD changer, 3.23 performance rear end, etc…
Mods: Suncoast SS Hood, Ram Air Box, K & N Filter, Flowmaster Exhaust, SLP Y-Pipe, Hypertech Programmer and Nitto Drag Radials.
Best Timew/Whisper lid & Flowmaster Exhaust Only)
1/4 mile – 13.26
MPH – 104.64
60 ft – 1.975

[LT1der]

OK, here we go again. Who's right? Is it 2.5 or 2.75 on the Z-28?



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Dave "Vegatex" English
<'02 Sebring Silver/Ebony Leather Z-28 A4; T-tops, 3.23 gears, ASR.
Mods: Spectacle SFC's/STB, FIPK, de-screened MAF, red calipers, leather shift boot.
96 LT1-powered '76 Vega Wagon, Howell Engine Developments Computer and Harness, Sanderson CC-13HO headers, Be Cool aluminum rad w/dual 11" SPALS, custom cold air induction, 700r4, Modified 7.5" 10 bolt w/Torsen rear diff, 28-spline Moser Custom Alloy axles, 3.42 rear, '98 Camaro rear disks, cross-drilled and slotted S-10 front disks. 2800 pounds of fuel-injected Whoop-Ass!>
http://h-body.org/people/projects/building_lt1/index.html

[X DSM'er]

I fairly certain the the Z is 2.5" and the SS is 2.75". I swapped my stocker for an SS with a cut out.

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'99 Z28 M6
Mods: Click here!
Best Time: 13.3691 @ 106mph (no N2O)
60ft: 2.12
AOL IM: Bubblesnaps

[gillbot]

<font face="Verdana, Arial" size="2">Originally posted by X DSM'er:
I fairly certain the the Z is 2.5" and the SS is 2.75". I swapped my stocker for an SS with a cut out.

</font>

I have heard on many occasions that stock Z is 2.5" I'm just too lazy to go measure, LOL


------------------
2002 Camaro Z/28 LS1 A4 (2.73's)
Sunset Orange Metallic
Fernco, SLP Airlid, K&N Filter
-----------------------
1995 Ford Aspire M5
!Torque & !Power

[JDHarris]

I just so happened to have my stock Z28 exhaust sitting in my garage on the floor right now, so I figured I would chime in... it's definately a 2.75 inch i-pipe. Just took a ruler out there and measured the diameter. Hope this helps. :-D

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2002 Camaro Z28
Appearance: White, 5% tint, Black RS style racing stripes, RKSport rear Fascia lettering, SLP bowtie grille, diamond clear corners, gloss black calipers with chrome 'CAMARO' lettering, soon to have 18" Z06 rims

Performance: K&N FIPK, 3 inch custom exhaust by Thorley Headers/Jardine Performance, cutout, skip shift eliminator, FRA, DMS subframe connectors, Eibach pro-kit in the mail, more to come.

Stereo: Boston Pro-Series components, JL Audio 6.5 inch subs in sail panels, Kenwood KDC-X815 head unit, two Alpine V12 amps, Image Dynamics IDQ10 sub in JL Audio Stealthbox, Phatnoise MP3 player (AKA Kenwood music keg)

2001 Camaro RS
White w/ black stripes, all SLP options

1991 Camaro RS
Light blue, 305 V8, tinted windows, stereo system, lowered, KYB struts and shocks, chrome stock rims, Flowmaster exhaust with 3.5 inch tips

[X DSM'er]

<font face="Verdana, Arial" size="2"> just so happened to have my stock Z28 exhaust sitting in my garage on the floor right now, so I figured I would chime in... it's definately a 2.75 inch i-pipe. Just took a ruler out there and measured the diameter. Hope this helps. :-D </font>

That definately makes sense considering the SS exhaust was an exact fit to my Z28 Y. I must have been thinking about the muffler outlet pipes.

------------------
'99 Z28 M6
Mods: Click here!
Best Time: 13.3691 @ 106mph (no N2O)
60ft: 2.12
AOL IM: Bubblesnaps

[LT1der]

<font face="Verdana, Arial" size="2">Originally posted by JDHarris:
I just so happened to have my stock Z28 exhaust sitting in my garage on the floor right now, so I figured I would chime in... it's definately a 2.75 inch i-pipe. Just took a ruler out there and measured the diameter. Hope this helps. :-D

</font>

Thanks, JD. I was getting ready to take a tape measure and do the calculations.

Dave



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Dave "Vegatex" English
&lt;'02 Sebring Silver/Ebony Leather Z-28 A4; T-tops, 3.23 gears, ASR.
Mods: Spectacle SFC's/STB, FIPK, de-screened MAF, red calipers, leather shift boot.
96 LT1-powered '76 Vega Wagon, Howell Engine Developments Computer and Harness, Sanderson CC-13HO headers, Be Cool aluminum rad w/dual 11" SPALS, custom cold air induction, 700r4, Modified 7.5" 10 bolt w/Torsen rear diff, 28-spline Moser Custom Alloy axles, 3.42 rear, '98 Camaro rear disks, cross-drilled and slotted S-10 front disks. 2800 pounds of fuel-injected Whoop-Ass!&gt;
http://h-body.org/people/projects/building_lt1/index.html

[LT1der]

<font face="Verdana, Arial" size="2">Originally posted by LT1der:
Thanks, JD. I was getting ready to take a tape measure and do the calculations.
</font>

So I did anyway! Here's what I measured on a stock '02 Z-28: (Outer diameters only, slightlyless for I.D.)

From y-pipe to muffler-- 8.8 inches o.d. divided by pi = 2.8 inches diameter.

From muffler to tips-- 7.0 inches o.d. divided by pi = 2.2 inches diameter.

So it seems the stock Z-28 exhaust is 2.75" from the y-pipe to muffler, and from muffler to tips 2" diameter. SS is probably 2.75 and 2.5 respectively with a freere-flowing muffler.

Thanks to all who contributed,
Dave


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Dave "Vegatex" English
&lt;'02 Sebring Silver/Ebony Leather Z-28 A4; T-tops, 3.23 gears, ASR.
Mods: Spectacle SFC's/STB, FIPK, de-screened MAF, red calipers, leather shift boot.
96 LT1-powered '76 Vega Wagon, Howell Engine Developments Computer and Harness, Sanderson CC-13HO headers, Be Cool aluminum rad w/dual 11" SPALS, custom cold air induction, 700r4, Modified 7.5" 10 bolt w/Torsen rear diff, 28-spline Moser Custom Alloy axles, 3.42 rear, '98 Camaro rear disks, cross-drilled and slotted S-10 front disks. 2800 pounds of fuel-injected Whoop-Ass!&gt;
http://h-body.org/people/projects/building_lt1/index.html