Canada WTB-454 Square Port Exhaust Manifolds or Headers - The 1947 - Present Chevrolet & GMC Truck Message Board Network

CanadianK20 · 09-19-2016, 11:34 AM

Need a set of either block hugger headers or stock exhaust manifolds. No long tube headers, as that's what I have and they cause exhaust routing issues.

**70STOVEBOLT** · 09-19-2016, 05:38 PM

Do you have the Chevelle headers or the truck headers? Might be interested in a trade for my stock manifolds if they are the Chevelle headers.

CanadianK20 · 09-19-2016, 06:03 PM

Truck headers. Chevelle ones would work.

**70STOVEBOLT** · 09-19-2016, 06:28 PM

Ok thanks.

Abe31968 · 09-20-2016, 02:28 PM

I have two pair 73-78 454 truck exhaust manifolds. The motors were round port intakes. I don't know the difference between round or square ports heads. ???

CanadianK20 · 09-20-2016, 03:03 PM

Thanks but the difference is just that. One has square ports, one has round on the block.

Abe31968 · 09-20-2016, 05:38 PM

Quote:

Originally Posted by CanadianK20

Thanks but the difference is just that. One has square ports, one has round on the block.

I've been running bbc since 1978 and never noticed a difference in the exhaust ports only the intake ports. Guess I am still learning.

**PICKMUP** · 09-20-2016, 05:47 PM

Have you seen these:
http://67-72chevytrucks.com/vboard/s...d.php?t=718248

**70STOVEBOLT** · 09-20-2016, 09:51 PM

There is no difference in the exhaust ports. There are oval port and rectangle (square) intake ports. There are, however, square and round port headers, and I have heard the round ports don't seal up well, unless you use expensive copper gaskets.

Abe31968 · 09-20-2016, 11:03 PM

Thanks for the info. Nice manifold

bL.A.zer90045 · 09-20-2016, 11:10 PM

I have over ten sets of the "square port" bbc xmanis--185.37 shipped to Alberta.

09-19-2016, 11:34 AM	#1
CanadianK20 Registered User Join Date: Sep 2012 Location: Medicine Hat, Alberta Posts: 67	WTB-454 Square Port Exhaust Manifolds or Headers Need a set of either block hugger headers or stock exhaust manifolds. No long tube headers, as that's what I have and they cause exhaust routing issues.

09-19-2016, 05:38 PM	#2
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,424	Re: WTB-454 Square Port Exhaust Manifolds or Headers Do you have the Chevelle headers or the truck headers? Might be interested in a trade for my stock manifolds if they are the Chevelle headers. __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Sliding Rear Window Power Windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear

09-19-2016, 06:03 PM	#3
CanadianK20 Registered User Join Date: Sep 2012 Location: Medicine Hat, Alberta Posts: 67	Re: WTB-454 Square Port Exhaust Manifolds or Headers Truck headers. Chevelle ones would work.

09-19-2016, 06:28 PM	#4
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,424	Re: WTB-454 Square Port Exhaust Manifolds or Headers Ok thanks. __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Sliding Rear Window Power Windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear

09-20-2016, 02:28 PM	#5
Abe31968 Registered User Join Date: Jun 2014 Location: Laingsburg, MI Posts: 292	Re: WTB-454 Square Port Exhaust Manifolds or Headers I have two pair 73-78 454 truck exhaust manifolds. The motors were round port intakes. I don't know the difference between round or square ports heads. ???

09-20-2016, 03:03 PM	#6
CanadianK20 Registered User Join Date: Sep 2012 Location: Medicine Hat, Alberta Posts: 67	Re: WTB-454 Square Port Exhaust Manifolds or Headers Thanks but the difference is just that. One has square ports, one has round on the block.

09-20-2016, 05:47 PM	#8
PICKMUP "Trucks with Class" Join Date: Jul 2000 Location: OLYMPIA, WA, USA Posts: 8,158	Re: WTB-454 Square Port Exhaust Manifolds or Headers Have you seen these: http://67-72chevytrucks.com/vboard/s...d.php?t=718248 __________________ Email: frankeham@comcast.net Phone: 360-956-7170

09-20-2016, 09:51 PM	#9
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,424	Re: WTB-454 Square Port Exhaust Manifolds or Headers There is no difference in the exhaust ports. There are oval port and rectangle (square) intake ports. There are, however, square and round port headers, and I have heard the round ports don't seal up well, unless you use expensive copper gaskets. __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Sliding Rear Window Power Windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear

09-20-2016, 11:03 PM	#10
Abe31968 Registered User Join Date: Jun 2014 Location: Laingsburg, MI Posts: 292	Re: WTB-454 Square Port Exhaust Manifolds or Headers Thanks for the info. Nice manifold

09-20-2016, 11:10 PM	#11
bL.A.zer90045 Registered User Join Date: May 2012 Location: 90045 cali Posts: 567	Re: WTB-454 Square Port Exhaust Manifolds or Headers I have over ten sets of the "square port" bbc xmanis--185.37 shipped to Alberta.



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