WTB 90 ZR1 Exhaust w/Resonator #39399 - ZR-1 Net Registry Forums

S.hafsmo · 12-15-2016

Currently looking for the center part of the ZR1 exhaust.
Can't buy the whole thing, as it's just to massive to ship over seas.
The part I'm looking for is #39399 on this drawing.

The most important bit is the one between the two mounts on each side of the center resonator (incl. the mounts), and a few inches in front of the forward mounts.

My resonator has been replaced with this:

And I am not quite sure a Corsa would pass the inspection here in Norway.

Mr Blue · 12-15-2016

Are you looking to maintain the stock 1990 exhaust system? If not the later 92-95 resonator offers better flow and more power. The internal pipe diameters are significantly larger.

David

S.hafsmo · 12-15-2016

I'll probably get the Corsa at some point, so flow is not really that important.
Is the rest of the post 92 exhaust the same? If I cut my exhaust before and after this "modification", would a similar piece from a later exhaust fit?

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Mr Blue · 12-16-2016

Yes, the late resonator will mate to the earlier pipes. It does not need to be a ZR-1 resonator, any 92-96 resonator will be lower restriction.

S.hafsmo · 12-16-2016

Interesting. Maybe I'll be able to acquire those parts on this side of the pond, if any post 92 stock exhaust resonator will do.

GOLDCYLON · 12-16-2016

If you can find one a factory LT4 resonator was considered to have the best flow however those can only be found on 1996 LT4 equipped C4s

S.hafsmo · 12-16-2016

Probably unlikely I'd find one. Lt1 resonator - maybe.

billschroeder5842 · 01-09-2017

I have a 93 resonator in great condition that will weld on perfectly. From my research Chevrolet used the same resonator with the 2 5/8 inside diameter for all LT1, LT4, LT5 applications from 92-96. PM me if you are insterested. Thanks!

12-15-2016	#1
S.hafsmo Join Date: Nov 2016 Location: Norway Posts: 397	WTB 90 ZR1 Exhaust w/Resonator #39399 Currently looking for the center part of the ZR1 exhaust. Can't buy the whole thing, as it's just to massive to ship over seas. The part I'm looking for is #39399 on this drawing. The most important bit is the one between the two mounts on each side of the center resonator (incl. the mounts), and a few inches in front of the forward mounts. My resonator has been replaced with this: And I am not quite sure a Corsa would pass the inspection here in Norway.

12-15-2016	#2
Mr Blue Join Date: Feb 2013 Location: Tallmadge OH Posts: 116	Re: WTB 90 ZR1 Exhaust w/Resonator #39399 Are you looking to maintain the stock 1990 exhaust system? If not the later 92-95 resonator offers better flow and more power. The internal pipe diameters are significantly larger. David

12-16-2016	#4
Mr Blue Join Date: Feb 2013 Location: Tallmadge OH Posts: 116	Re: WTB 90 ZR1 Exhaust w/Resonator #39399 Yes, the late resonator will mate to the earlier pipes. It does not need to be a ZR-1 resonator, any 92-96 resonator will be lower restriction.

12-16-2016	#5
S.hafsmo Join Date: Nov 2016 Location: Norway Posts: 397	Re: WTB 90 ZR1 Exhaust w/Resonator #39399 Interesting. Maybe I'll be able to acquire those parts on this side of the pond, if any post 92 stock exhaust resonator will do.

12-16-2016	#6
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,155	Re: WTB 90 ZR1 Exhaust w/Resonator #39399 If you can find one a factory LT4 resonator was considered to have the best flow however those can only be found on 1996 LT4 equipped C4s __________________ GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V

01-09-2017	#8
billschroeder5842 Join Date: Nov 2016 Location: Southlake, TX Posts: 592	Re: WTB 90 ZR1 Exhaust w/Resonator #39399 I have a 93 resonator in great condition that will weld on perfectly. From my research Chevrolet used the same resonator with the 2 5/8 inside diameter for all LT1, LT4, LT5 applications from 92-96. PM me if you are insterested. Thanks! __________________ Bill Schroeder Texas Proud! 1991 Corvette ZR1 #1388 2015 Challenger Scat Pack Shaker