CaliforniaSpecial.com -- Message Boards -- 1968 California Special Limited Edition Ford Mustang GT/CS
D I S C U S S I O N . F O R U M
COMMUNITY
1968 GT/CS & HCS
2007+ GT/CS
1966-1967 HCS

Vote!

Old 04/22/2006, 07:02 AM   #1
GTCSMustang
 
GTCSMustang's Avatar
 

Location: Ridgecrest, Ca
Joined: Mar 03
Posts: 703

428 Cobra Jet Exhaust

I put some information on original exhaust in a different post, and have copied it here with some pictures for anyone interested in reading it. I became motivated to write something here after seeing Bob Teets 428 HCS at Knott Berry Farm a couple of weeks ago and was surprised when I saw that it still retained ALL the original exhaust components. How COOL is that.

The exhaust for Cobra Jet cars is specific to 428 CJs and was not used on any other 1968 Mustang except for GT500KRs. The entire system for a CJ car uses 2.25-inch pipes for the H-pipe, resonators, and tail-pipes. The muffler and tail pipe construction are also different than other dual-exhaust cars that use the 2-inch pipes. Below describes the differences and similarities of the two systems (Cobra Jet and non-Cobra Jet such as 302 GT, 390 GT, GT350 Shelbys, and GT500 Shelbys).

H-Pipe: Similar for both systems. Cobra Jet pipe is 2.25-inch and non-Cobra Jet is 2-inch.

Resonator Pipes: Similar for both systems. Cobra Jet pipe is 2.25-inch and non-Cobra Jet is 2-inch. Both have double-hump resonators. The 1969 2.25-inch resonators are triple-hump and are not correct for 1968. Arvin was the original subcontractor to Ford for the exhaust systems and made a run of replacement resonator pipes that sometimes show up, but they are triple-hump. Because the pipes tended to rust and the resonators did not, you can sometimes take the resonators from a rusted system and splice them into replacement (repro) pipes and have them turn out pretty good.

Muffler: The 2-inch muffler is a C8ZA-5230-C. It has a FoMoCo in a rectangle stamped into the muffler casing along with the part number and date. The 2.25-inch muffler is an ED-C8ZA-5230-E. . It has a Ford in an oval stamped into the muffler casing along with the part number and date. Both of these mufflers are very hard to find and getting a good date is even harder. You can enlarge the 2-inch muffler to 2.25-inch with some creative welding, but you still have the wrong part number.

Tail Pipes: The 2-inch tail pipes and tips are two separate items. The chrome quad-tips slide onto the 2-inch pipe and is held in place by a clamp. The 2.25-inch tail pipe and quad tip are one welded assembly and have no clamp to hold it together. Two inch pipes and tips are not too hard to find. 2.25-inch is nearly impossible, but you can do a reasonable job of welding it up.

Hangers: All of the hanging hardware for 2-inch and 2.25-inch is the same.

Clamps: Three types of clamps are used. Saddle, band, and horseshoe. The horseshoe clamp is only used on the 2-inch system to hold the tail pipe and tip together. The saddle clamps are used on the h-pipe to resonator pipes (2), resonator pipes to muffler (2), and tail pipes to muffler (2). The band clamps (2) are used to hold the tail pipes to the J-hook hanger. 2-inch systems used 2-inch saddle clamps, but 2.25-inch systems used 2.125-inch and 2.25-inch saddle clamps. The orientation of the clamps is remarkably consistent from car to car on cars built at the Metuchen plant. I canít comment on San Jose CJs though.

Misc: All the exhaust systems had a tab and notch design for assembling the systems. I believe the systems were assembled on the ground and swung up into the cars as entire assemblies before the rear ends were installed.

68.5 Blck Mustang CJ Cnvrt, 68 Lme Gld GT/CS, 68 Rd HCS (fact 428), 68 Ac Bl Mustang GT Cnvrt, 68 Ylw GT500KR Cnvrt, 68 Hlnd Grn GT500KR Cnvrt, 68 Gld G.T. 500 Cnvrt, 68 Ryl Maroon Mustang Sprint Cpe, 68.5 Hlnd Grn Fstbck, 68.5 Ylw Mustang Fstbck. Visit my website www.scottfullerreproductions.com .
GTCSMustang is offline   Reply With Quote
Old 04/22/2006, 07:05 AM   #2
GTCSMustang
 
GTCSMustang's Avatar
 

Location: Ridgecrest, Ca
Joined: Mar 03
Posts: 703

Original 2.25-inch Cobra Jet mufflers. One is NOS and one is original to car.
Attached Thumbnails
Click image for larger version

Name:	DSC00278.JPG
Views:	10
Size:	59.7 KB
ID:	1705   Click image for larger version

Name:	DSC00282.JPG
Views:	9
Size:	62.2 KB
ID:	1706  

68.5 Blck Mustang CJ Cnvrt, 68 Lme Gld GT/CS, 68 Rd HCS (fact 428), 68 Ac Bl Mustang GT Cnvrt, 68 Ylw GT500KR Cnvrt, 68 Hlnd Grn GT500KR Cnvrt, 68 Gld G.T. 500 Cnvrt, 68 Ryl Maroon Mustang Sprint Cpe, 68.5 Hlnd Grn Fstbck, 68.5 Ylw Mustang Fstbck. Visit my website www.scottfullerreproductions.com .
GTCSMustang is offline   Reply With Quote
Old 04/22/2006, 07:08 AM   #3
GTCSMustang
 
GTCSMustang's Avatar
 

Location: Ridgecrest, Ca
Joined: Mar 03
Posts: 703

Original 2-inch NOS mufflers. One has been modified to 2.25-inch outlets.
Attached Thumbnails
Click image for larger version

Name:	DSC00289.JPG
Views:	9
Size:	62.1 KB
ID:	1707   Click image for larger version

Name:	DSC00291.JPG
Views:	7
Size:	57.9 KB
ID:	1708  

68.5 Blck Mustang CJ Cnvrt, 68 Lme Gld GT/CS, 68 Rd HCS (fact 428), 68 Ac Bl Mustang GT Cnvrt, 68 Ylw GT500KR Cnvrt, 68 Hlnd Grn GT500KR Cnvrt, 68 Gld G.T. 500 Cnvrt, 68 Ryl Maroon Mustang Sprint Cpe, 68.5 Hlnd Grn Fstbck, 68.5 Ylw Mustang Fstbck. Visit my website www.scottfullerreproductions.com .
GTCSMustang is offline   Reply With Quote
Old 04/22/2006, 07:15 AM   #4
GTCSMustang
 
GTCSMustang's Avatar
 

Location: Ridgecrest, Ca
Joined: Mar 03
Posts: 703

Original resonator pipes (2.25), tail pipe hanger hardware, saddle clamps, and tab and notch details.
Attached Thumbnails
Click image for larger version

Name:	DSC00285.JPG
Views:	7
Size:	61.2 KB
ID:	1709   Click image for larger version

Name:	DSC00274.JPG
Views:	8
Size:	59.9 KB
ID:	1710   Click image for larger version

Name:	DSC00270.JPG
Views:	9
Size:	58.5 KB
ID:	1711  

Click image for larger version

Name:	DSC00275.JPG
Views:	10
Size:	57.3 KB
ID:	1712  

68.5 Blck Mustang CJ Cnvrt, 68 Lme Gld GT/CS, 68 Rd HCS (fact 428), 68 Ac Bl Mustang GT Cnvrt, 68 Ylw GT500KR Cnvrt, 68 Hlnd Grn GT500KR Cnvrt, 68 Gld G.T. 500 Cnvrt, 68 Ryl Maroon Mustang Sprint Cpe, 68.5 Hlnd Grn Fstbck, 68.5 Ylw Mustang Fstbck. Visit my website www.scottfullerreproductions.com .
GTCSMustang is offline   Reply With Quote
Old 04/22/2006, 10:36 AM   #5
6t8-390gt
 
6t8-390gt's Avatar
 

Location: So. Maryland
Joined: Jul 04
Posts: 487

Great Info, thanks for sharing it with us.

Danny
6t8-390gt is offline   Reply With Quote
Old 04/22/2006, 06:48 PM   #6
case12
 
case12's Avatar
 
'66 Convert., '00 GT Convert., '36 Ford, '07 Shelby GT-H Convt.

Location: Crystal Lake, IL
Joined: Oct 04
eBay: case12
Posts: 1,450

Wow! We should put this thread in the Restoration Reference forum so for everyone to reference in the future. Casey
case12 is offline   Reply With Quote
Old 04/22/2006, 10:30 PM   #7
GTCSMustang
 
GTCSMustang's Avatar
 

Location: Ridgecrest, Ca
Joined: Mar 03
Posts: 703

2-inch original tail pipes and tips. Correct for 1967/1968 Mustang GT (302, 390).
Attached Thumbnails
Click image for larger version

Name:	DSC00295.JPG
Views:	14
Size:	60.1 KB
ID:	1716   Click image for larger version

Name:	DSC00296.JPG
Views:	8
Size:	59.7 KB
ID:	1717  

68.5 Blck Mustang CJ Cnvrt, 68 Lme Gld GT/CS, 68 Rd HCS (fact 428), 68 Ac Bl Mustang GT Cnvrt, 68 Ylw GT500KR Cnvrt, 68 Hlnd Grn GT500KR Cnvrt, 68 Gld G.T. 500 Cnvrt, 68 Ryl Maroon Mustang Sprint Cpe, 68.5 Hlnd Grn Fstbck, 68.5 Ylw Mustang Fstbck. Visit my website www.scottfullerreproductions.com .
GTCSMustang is offline   Reply With Quote
Reply

  CaliforniaSpecial.com Forums > GT/CS and HCS Forums > GT/CS and HCS Discussions

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
A few updated pics of my Cobra Jet motor freshening 390cs68rcode Off Topic Lounge 2 03/14/2006 08:50 PM
Correct Cobra Jet Intake 390cs68rcode Engine 0 03/10/2006 03:26 PM
Sunday afternoon project for the Cobra Jet 390cs68rcode Off Topic Lounge 3 03/06/2006 04:24 PM
Closed a deal on a 68.5 Cobra Jet fastback today 390cs68rcode GT/CS and HCS Discussions 34 01/23/2006 08:33 PM
Cobra Jet for sale hcsstang Classified Ads 2 10/06/2004 09:11 AM


All times are GMT -7. The time now is 05:13 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2017, vBulletin Solutions Inc.


This site created, owned and maintained by Jon Hanna - Copyright © 1996-2011
All rights reserved. CaliforniaSpecial.com is not affiliated with Ford Motor Company

ShowCase vBulletin Plugins by Drive Thru Online, Inc.