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For Those Times When You Can't Seem to Find a Decent Header That Fits
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Topic: For Those Times When You Can't Seem to Find a Decent Header That Fits (Read 1891 times)
ehjorten
Senior Member
Posts: 1203
For Those Times When You Can't Seem to Find a Decent Header That Fits
«
on:
August 30, 2022, 12:33:28 PM »
Driver's side full-length LS headers just don't seem to fit my '91 V3500 with the stock 4L80e and stock column shift linkage.
So...I designed and printed my header. I am just about ready to test fit it! Glued up the last bits this morning. If everything fits properly, I will buy the components and have the tubes CNC Mandrel Bent.
Logged
-Erik-
1991 V3500 - Gen V TBI 454, 4L80E, NP205, 14 bolt FF, D60, 8" Lift on 35s
1977 K20 Silverado - 350, THM350, NP203, 14 bolt FF, D44, Stock Lift on 31s
1969 Chevelle Malibu Sport Coupe - EFI350, THM350
1968 Chevrolet Step-side Pickup - 300HP L6
Shifty
Junior Member
Posts: 961
I bleed Bowtie red...
Re: For Those Times When You Can't Seem to Find a Decent Header That Fits
«
Reply #1 on:
August 30, 2022, 01:44:35 PM »
That, good sir, is bad-as&!
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87 V20 Standard Cab Longbed (current)
87 R30 3+3 Longbed (days of yore)
98 C2500 ext cab longbed
Geezer77GMC
Newbie
Posts: 63
Newbie
Re: For Those Times When You Can't Seem to Find a Decent Header That Fits
«
Reply #2 on:
August 30, 2022, 02:13:40 PM »
Sweet! We need more "can do" and "actually do" folks in this country. Seems that so many folks just can't figure what to do if something isn't on the shelf, all the work and thought already packaged for them.
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Da67goatman
Site Supporters
Junior Member
Posts: 757
Burban
Re: For Those Times When You Can't Seem to Find a Decent Header That Fits
«
Reply #3 on:
August 30, 2022, 02:51:09 PM »
Nice job. That would have cost millions if a brand name company tried it, and it still wouldn't fit lol. I'm assuming since you've put forth this much effort already, you'll have them made from titanium for extra awesomeness; or maybe just stainless so there's no need to re-mortgage your house to pay for em
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<Pitcrew>
1989 R2500 Suburban mild 350 TBI 700r4 10.5" 14bolt 4.10 w/ 33s
1992 fullsize Blazer 4x4 35s no lift, 4.10s, Hella driving lights, TJ Flares, Huge bumpers, Snorkel, custom interior
ehjorten
Senior Member
Posts: 1203
Re: For Those Times When You Can't Seem to Find a Decent Header That Fits
«
Reply #4 on:
August 30, 2022, 03:19:04 PM »
My passenger's side header fits great! I did have to make a slight clearance for one of the tubes at the frame rail flange. They are from a 2010 Camaro. The headers that I first bought that were "LS Conversion Headers" for square body trucks did not fit at all on the passenger's side! Even cutting off the ear of the transmission wouldn't have made those things fit!!! The truck used to have a 454 with full length headers, so it isn't impossible, and no modification to the 4L80e case.
The headers will be 304 stainless. Printed ABS just isn't going to hold up!
«
Last Edit: August 31, 2022, 08:49:40 AM by ehjorten
»
Logged
-Erik-
1991 V3500 - Gen V TBI 454, 4L80E, NP205, 14 bolt FF, D60, 8" Lift on 35s
1977 K20 Silverado - 350, THM350, NP203, 14 bolt FF, D44, Stock Lift on 31s
1969 Chevelle Malibu Sport Coupe - EFI350, THM350
1968 Chevrolet Step-side Pickup - 300HP L6
ehjorten
Senior Member
Posts: 1203
Re: For Those Times When You Can't Seem to Find a Decent Header That Fits
«
Reply #5 on:
September 01, 2022, 04:13:44 PM »
Fit the 3D printed header in place. Everything fit as I had expected and hoped! Full clearance to shift linkage and all of the stock plug wires fit without issue. The #3 plug was the only one that didn't fit at all with the 2015 Camaro headers, besides the fact that the shift linkage ran into the collector.
Next step is to see about getting the tubes CNC mandrel bent and what that is going to cost. 1.75" OD x 0.065" [16 ga] 304 stainless.
«
Last Edit: September 01, 2022, 04:20:22 PM by ehjorten
»
Logged
-Erik-
1991 V3500 - Gen V TBI 454, 4L80E, NP205, 14 bolt FF, D60, 8" Lift on 35s
1977 K20 Silverado - 350, THM350, NP203, 14 bolt FF, D44, Stock Lift on 31s
1969 Chevelle Malibu Sport Coupe - EFI350, THM350
1968 Chevrolet Step-side Pickup - 300HP L6
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For Those Times When You Can't Seem to Find a Decent Header That Fits