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1st Generation 1964 1/2 - 1973 - Questions & general discussions that apply to a specific year => 1966 Mustang => Topic started by: mmus65tang on May 27, 2020, 01:11:36 AM

Title: Hipo Exhaust Manifold Lock Tabs
Post by: mmus65tang on May 27, 2020, 01:11:36 AM
I am currently restoring a 1966 Hipo Fastback, August Detroit build. My question is did Hipo's after 12/65 have the exhaust manifold lock tabs. NPDs catalog offers only reproduction exhaust lock tabs b4 12/65. My car did not have the locking tabs when I purchased it 40 years ago but they could have been removed years ago before I owned the car. I could not find any information on this subject in the "Library". And Tony Gregory's book "The High Performance Mustang", doesn't discuss this subject. So, no exhaust tabs or does it use exhaust tabs that just aren't being reproduced? Thanks for the help.
Title: Re: Hipo Exhaust Manifold Lock Tabs
Post by: carlite65 on May 27, 2020, 08:37:58 AM
i believe you should have the ramp loc bolts. at last check virginia classic mustang offered both styles.
Title: Re: Hipo Exhaust Manifold Lock Tabs
Post by: mmus65tang on May 27, 2020, 01:51:53 PM
So, my car would use the Ramp Loc Bolts without the earlier used lock tabs?
Title: Re: Hipo Exhaust Manifold Lock Tabs
Post by: carlite65 on May 27, 2020, 02:00:22 PM
is that not what i stated above?
Title: Re: Hipo Exhaust Manifold Lock Tabs
Post by: jwc66k on May 27, 2020, 02:20:04 PM
I am currently restoring a 1966 Hipo Fastback, August Detroit build.
Which "August"? The "H" scheduled date code is August 1965, which would require "locking tabs". The "V" scheduled date code is August, 1966, would use Ramp Lock bolts.
Jim
Title: Re: Hipo Exhaust Manifold Lock Tabs
Post by: Bossbill on May 27, 2020, 04:42:32 PM
While digging into the various Hi-Po exhaust manifolds in Mannel, I wrote this down too. Mannel reference in parenthesis.

63 - Nov 65:  Hi-Po manifold used locking tabs with flat washer under locking tab. (3D3-h)

Dec 65: Hi-Po manifolds used Ramp Locks and flat washers. Yes, both washers. The aftermarket vendor supplied kits in most cases do not include the flat washer. (6D3-b)

67 "As the year progressed": Flat washer no longer used. At the  end of 67 bolts were no longer fully threaded and shorter. (Sec 7D3)

=>add "flat"
Title: Re: Hipo Exhaust Manifold Lock Tabs
Post by: mmus65tang on May 28, 2020, 12:32:39 AM
The Hipo is an August 66 build "V" code.
Title: Re: Hipo Exhaust Manifold Lock Tabs
Post by: CharlesTurner on May 28, 2020, 11:03:57 AM
The Hipo is an August 66 build "V" code.

With that late of a build for a '66, ramp-loc style exhaust manifold bolts would be expected.
Title: Re: Hipo Exhaust Manifold Lock Tabs
Post by: mmus65tang on May 28, 2020, 01:20:47 PM
Thanks Guys for your help.