C5 early vs late exhaust manifolds and "H" pipe
04-20-2017, 08:42 PM
#1
C5 early vs late exhaust manifolds and "H" pipe
Hey guys, I have an 01 Z that I'm removing aftermarket long tubes and X pipe (I know, I know) and putting stock manifolds/cats/H pipe back on. There is a GM part number change for the stock manifolds and H pipe from early models (97-00) and late (01-04). I know the EGR changed slightly but am not sure about overall fitment/dimensions. Has anyone ever bolted late(01) manifolds to an early(99) H pipe? Thanks!
04-21-2017, 02:55 AM
#2
Race Director
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The manifold to mid-pipe attachment is different too. I'm pretty sure they either won't bolt-up between early and late years or would bolt-up but not seal right.
The AIR tube is what changed. With the correct matching AIR tube, you could either bolt an early exhaust and midpipe onto a later car or the opposite.
The AIR tube is what changed. With the correct matching AIR tube, you could either bolt an early exhaust and midpipe onto a later car or the opposite.
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bmc01z (04-21-2017)
04-21-2017, 12:41 PM
#3
The manifold to mid-pipe attachment is different too. I'm pretty sure they either won't bolt-up between early and late years or would bolt-up but not seal right.
The AIR tube is what changed. With the correct matching AIR tube, you could either bolt an early exhaust and midpipe onto a later car or the opposite.
The AIR tube is what changed. With the correct matching AIR tube, you could either bolt an early exhaust and midpipe onto a later car or the opposite.
Thank you for the confirmation!
04-21-2017, 02:04 PM
#4
Burning Brakes
There are actually 4 exhaust versions for the C5 manifolds and H-pipe.
'97 - '99 used a stamped manifold which was a couple inches longer, and will ONLY mate to the corresponding "shorter" H-pipe. None had the little "pup" cats on the front of the H-pipe. Main cats were two-stage, and probably not as efficient as later '02 -'04 cats. The AIR pipe on the passenger side hooked in near the last cylinder exhaust. The oil dipstick was different from the '01- '04, and bolted on differently.
The 2000 was the bastard child (I have one).
The manifolds were still stamped, but were shorter, requiring a longer H-pipe, some of which (California/Vermont only) had the new little "pup" cats on the front of the h-pipe.
The AIR and dipstick located same as the '97- '99.
The '01 std and Z changed to cast manifolds, Longer H-pipe, and all had "pup" cats. The passenger AIR pipe was moved forward near the 3rd cylinder, the dipstick mounted differently.
'02-'04 std remained the same as the '01, The Z deleted the "pup"cats from the H-pipe.
For an '01 Z easy swap back to stock, best choice is:
Any of the cast manifolds (std or Z are the same) from '01 to '04.
Non-pup H-pipe from '00 to '04.
Passenger AIR pipe and dipstick pipe from '01 - '04. (which I assume you still have).
Of course, ALL versions bolt up to any rear muffler system.
Clear as mud, right?
DG
'97 - '99 used a stamped manifold which was a couple inches longer, and will ONLY mate to the corresponding "shorter" H-pipe. None had the little "pup" cats on the front of the H-pipe. Main cats were two-stage, and probably not as efficient as later '02 -'04 cats. The AIR pipe on the passenger side hooked in near the last cylinder exhaust. The oil dipstick was different from the '01- '04, and bolted on differently.
The 2000 was the bastard child (I have one).
The manifolds were still stamped, but were shorter, requiring a longer H-pipe, some of which (California/Vermont only) had the new little "pup" cats on the front of the h-pipe.
The AIR and dipstick located same as the '97- '99.
The '01 std and Z changed to cast manifolds, Longer H-pipe, and all had "pup" cats. The passenger AIR pipe was moved forward near the 3rd cylinder, the dipstick mounted differently.
'02-'04 std remained the same as the '01, The Z deleted the "pup"cats from the H-pipe.
For an '01 Z easy swap back to stock, best choice is:
Any of the cast manifolds (std or Z are the same) from '01 to '04.
Non-pup H-pipe from '00 to '04.
Passenger AIR pipe and dipstick pipe from '01 - '04. (which I assume you still have).
Of course, ALL versions bolt up to any rear muffler system.
Clear as mud, right?
DG
04-22-2017, 11:55 AM
#5
Melting Slicks
The 2000 was the bastard child (I have one).
The manifolds were still stamped, but were shorter, requiring a longer H-pipe, some of which (California/Vermont only) had the new little "pup" cats on the front of the h-pipe.
I believe NY also had the pup cats, I bought a 2000 that came off lease from a NY dealer and they had them.
The manifolds were still stamped, but were shorter, requiring a longer H-pipe, some of which (California/Vermont only) had the new little "pup" cats on the front of the h-pipe.
I believe NY also had the pup cats, I bought a 2000 that came off lease from a NY dealer and they had them.
04-23-2017, 01:13 AM
#6
There are actually 4 exhaust versions for the C5 manifolds and H-pipe.
'97 - '99 used a stamped manifold which was a couple inches longer, and will ONLY mate to the corresponding "shorter" H-pipe. None had the little "pup" cats on the front of the H-pipe. Main cats were two-stage, and probably not as efficient as later '02 -'04 cats. The AIR pipe on the passenger side hooked in near the last cylinder exhaust. The oil dipstick was different from the '01- '04, and bolted on differently.
The 2000 was the bastard child (I have one).
The manifolds were still stamped, but were shorter, requiring a longer H-pipe, some of which (California/Vermont only) had the new little "pup" cats on the front of the h-pipe.
The AIR and dipstick located same as the '97- '99.
The '01 std and Z changed to cast manifolds, Longer H-pipe, and all had "pup" cats. The passenger AIR pipe was moved forward near the 3rd cylinder, the dipstick mounted differently.
'02-'04 std remained the same as the '01, The Z deleted the "pup"cats from the H-pipe.
For an '01 Z easy swap back to stock, best choice is:
Any of the cast manifolds (std or Z are the same) from '01 to '04.
Non-pup H-pipe from '00 to '04.
Passenger AIR pipe and dipstick pipe from '01 - '04. (which I assume you still have).
Of course, ALL versions bolt up to any rear muffler system.
Clear as mud, right?
DG
'97 - '99 used a stamped manifold which was a couple inches longer, and will ONLY mate to the corresponding "shorter" H-pipe. None had the little "pup" cats on the front of the H-pipe. Main cats were two-stage, and probably not as efficient as later '02 -'04 cats. The AIR pipe on the passenger side hooked in near the last cylinder exhaust. The oil dipstick was different from the '01- '04, and bolted on differently.
The 2000 was the bastard child (I have one).
The manifolds were still stamped, but were shorter, requiring a longer H-pipe, some of which (California/Vermont only) had the new little "pup" cats on the front of the h-pipe.
The AIR and dipstick located same as the '97- '99.
The '01 std and Z changed to cast manifolds, Longer H-pipe, and all had "pup" cats. The passenger AIR pipe was moved forward near the 3rd cylinder, the dipstick mounted differently.
'02-'04 std remained the same as the '01, The Z deleted the "pup"cats from the H-pipe.
For an '01 Z easy swap back to stock, best choice is:
Any of the cast manifolds (std or Z are the same) from '01 to '04.
Non-pup H-pipe from '00 to '04.
Passenger AIR pipe and dipstick pipe from '01 - '04. (which I assume you still have).
Of course, ALL versions bolt up to any rear muffler system.
Clear as mud, right?
DG
DG,
Thanks for clearing this up. You've helped a ton. I knew there were some differences but didn't know there were this many. Did I mention I pulled the LS6 and am swapping for a custom built forged 24x LS7 and trying to pass strict CA emissions? Fun stuff. Appreciate the insight 10 fold.
