Z28 Headers on a PPV

Discussion on fuel delivery & intake/exhaust tech & mods.
Pursuit
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Z28 Headers on a PPV

Post by Pursuit » Tue May 16, 2017 3:42 pm

I acquired the Z28 Tri-Y headers almost a year ago for $300, shipping included. They did not come with the heat shields. I was finally able to compare them to our cast manifolds (PPV/SS/ZL1). I mocked them up using the SS/ZL1 catalytic head pipes.
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Maurice Sheil

mhsheil@gmail.com

2011 Caprice Phantom Black 9C3
2012 Impala 9C1
1995 9C1 Caprice
1996 GMC Sierra C1500
1974 SJ Grand Prix 455 well optioned with factory moon roof

Pursuit
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Location: Omaha, NE area

Re: Z28 Headers on a PPV

Post by Pursuit » Tue May 16, 2017 3:51 pm

We installed the headers onto the engine. We sectioned the head pipe flanges off of the piping for the cats. we bolted the flanges to the header and then removed approximately 1-1/2" from the "height" of the pipe, just above the O2 sensors.
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Maurice Sheil

mhsheil@gmail.com

2011 Caprice Phantom Black 9C3
2012 Impala 9C1
1995 9C1 Caprice
1996 GMC Sierra C1500
1974 SJ Grand Prix 455 well optioned with factory moon roof

Pursuit
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Posts: 766
Joined: Tue Apr 23, 2013 8:39 pm
Location: Omaha, NE area

Re: Z28 Headers on a PPV

Post by Pursuit » Tue May 16, 2017 3:53 pm

And now the view from the top with the heat shields installed.
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Maurice Sheil

mhsheil@gmail.com

2011 Caprice Phantom Black 9C3
2012 Impala 9C1
1995 9C1 Caprice
1996 GMC Sierra C1500
1974 SJ Grand Prix 455 well optioned with factory moon roof

CrashTestDummy
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Joined: Sat Feb 07, 2015 8:31 pm
Location: Pearland, Texas

Re: Z28 Headers on a PPV

Post by CrashTestDummy » Tue May 16, 2017 5:20 pm

Nice work, there. Looks all factory-like. :D
Gene Beaird,
Pearland, Texas
2012 Caprice 9C1
1992 B4C 1LE Camaro
2010 Tahoe PPV (her car)
1995 DGGM Impala SS
1996 BBB Impala SS (11-second DD)
1985 Firebird - 310 LS1 C Prepared autocross car.
And some others
Do YOU have my SPID?

s/c'd cav
Posts: 940
Joined: Mon May 30, 2016 8:12 am
Location: PHOENIX AZ

Re: Z28 Headers on a PPV

Post by s/c'd cav » Tue May 16, 2017 5:44 pm

what did you pay for the Z28 headers ? last i remember they werent to cheap

Pursuit
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Joined: Tue Apr 23, 2013 8:39 pm
Location: Omaha, NE area

Re: Z28 Headers on a PPV

Post by Pursuit » Tue May 16, 2017 6:37 pm

I kept a look out on eBay for a set. Less than $300 shipped. Every once and awhile a set will pop up.

Regards,

Maurice
Maurice Sheil

mhsheil@gmail.com

2011 Caprice Phantom Black 9C3
2012 Impala 9C1
1995 9C1 Caprice
1996 GMC Sierra C1500
1974 SJ Grand Prix 455 well optioned with factory moon roof

s/c'd cav
Posts: 940
Joined: Mon May 30, 2016 8:12 am
Location: PHOENIX AZ

Re: Z28 Headers on a PPV

Post by s/c'd cav » Tue May 16, 2017 6:46 pm

thats reasonable , guess ill have to keep a eye out

xcidmigs
Posts: 765
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Location: SE PA

Re: Z28 Headers on a PPV

Post by xcidmigs » Tue May 16, 2017 11:06 pm

Did you have to buy the z28 heat shields also or they were transfered over? Seems very obvious from the one photo that the section of tubing that connects the front cats to the manifold is much smaller diameter than the other sections used between the cats and the final pipe. This whole operation makes me think the hot ticket will be a set of coated shorty headers and have that front pipe replaced with 2 1/2"

Pursuit
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Location: Omaha, NE area

Re: Z28 Headers on a PPV

Post by Pursuit » Wed May 17, 2017 4:33 am

I also bought a set of 2017 LT4 headers and cats. The heat shields that came with them were an exact swap back to the Z28 headers. FYI they are very similar in design, but, the cylinder head exhaust flange is different due to the direct injection head design, and the collector is at different angle and uses four bolts for the cats. The LT4 header also has a 2" outlet...
Yes, the pipe leading into the catalytic converter is 2" and the outlet of the Z28 header is 2" also. Depending on the outlet diameter of a shorty header, increasing the pipe size could be beneficial. Anybody have a shorty header they could measure?

Regards,

Maurice
Maurice Sheil

mhsheil@gmail.com

2011 Caprice Phantom Black 9C3
2012 Impala 9C1
1995 9C1 Caprice
1996 GMC Sierra C1500
1974 SJ Grand Prix 455 well optioned with factory moon roof

chipperdoodles
Posts: 27
Joined: Thu Jul 12, 2018 7:12 pm

Re: Z28 Headers on a PPV

Post by chipperdoodles » Wed Apr 24, 2019 2:38 am

Was this fit to the stock exhaust? I like the compact tri-y nature of the ls7/z28 manifolds. There's nothing on the aftermarket really like them, just shorties and longtubes.

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