summit SUM-G9005 headers
#1
Junior Member
Thread Starter
Join Date: Apr 2006
Location: New Jersey
Posts: 49
Likes: 0
Received 0 Likes
on
0 Posts
Car: '89 Trans Am
Engine: LO3
Transmission: 700-R4
summit SUM-G9005 headers
I recently purchased and attempted to install the above headers. I say attempted because while the drivers side bolts up no problem, the last bolt on the passenger side does not line up with the hole in the block (the one closest to the firewall). It is off by about 1/2 an inch, while all the others line up fine.
I have a remanufactured 305 in the car, but the old manifolds were put on when the block was dropped into the car. Does anyone have advice as to what I can do? I only have regular access to hand tools, but if need be I can nurse the car to a garage where i can get more tools.
I have a remanufactured 305 in the car, but the old manifolds were put on when the block was dropped into the car. Does anyone have advice as to what I can do? I only have regular access to hand tools, but if need be I can nurse the car to a garage where i can get more tools.
#2
Moderator
Join Date: Jan 2000
Location: Mercedes Norte, Heredia, Costa Rica
Posts: 20,981
Likes: 0
Received 9 Likes
on
8 Posts
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: summit SUM-G9005 headers
You need heads that have the original SBC exhaust bolt pattern. You could drill and tap the missing hole in the head and plug the extra one. I'm surprised that you're only having this problem on one side, have you got two of the same heads, or are they different?
#3
Member
Join Date: Oct 2002
Location: Huntington beach, CA
Posts: 437
Likes: 0
Received 0 Likes
on
0 Posts
Car: Camaro
Engine: 5.slow
Transmission: 5 speed manual
Re: summit SUM-G9005 headers
I had this problem with my 400 when I dropped it in I needed to use the stock manifolds for a bit, but the last bolt on the pass side didnt line up just like yours I ended up ordering a set of headman headers and the bolt pattern was good for me, You might want to check the casting on the manifolds and see if you can figgure out if you ordered the wrong headers for the car. But besides the drilling and tapping idea I cant think of anything else though sorry.
#4
Junior Member
Thread Starter
Join Date: Apr 2006
Location: New Jersey
Posts: 49
Likes: 0
Received 0 Likes
on
0 Posts
Car: '89 Trans Am
Engine: LO3
Transmission: 700-R4
Re: summit SUM-G9005 headers
now, I ordered directly from summits website, and I had used my exact car specs for the actual search (i.e. pontiac, firebird, 1989, 305) and they were the only summit branded headers to come up. Has anyone else had this problem with summits headers, or what is a decent pair of shorty headers and matching y pipe I can get relatively cheap. (Unfortunately I do not have the money to get a pair of jet hot headers yet).
#6
Junior Member
Thread Starter
Join Date: Apr 2006
Location: New Jersey
Posts: 49
Likes: 0
Received 0 Likes
on
0 Posts
Car: '89 Trans Am
Engine: LO3
Transmission: 700-R4
Re: summit SUM-G9005 headers
sorry, i thought i had mentioned that part. The hole in the head is too far back
----------
I actually did check prior to installation, the headers match each other. Also, if the original manifold was put back on, wouldn't that automatically make it an original sbc bolt pattern? I assumed so, but if I knew it all i wouldn't be asking
----------
I actually did check prior to installation, the headers match each other. Also, if the original manifold was put back on, wouldn't that automatically make it an original sbc bolt pattern? I assumed so, but if I knew it all i wouldn't be asking
Last edited by evil_dave; 07-05-2007 at 08:45 PM. Reason: Automerged Doublepost
Trending Topics
#8
Moderator
Join Date: Jan 2000
Location: Mercedes Norte, Heredia, Costa Rica
Posts: 20,981
Likes: 0
Received 9 Likes
on
8 Posts
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: summit SUM-G9005 headers
At some point, GM decided to move that bolt back. I'd thought that the newer heads all had both holes drilled and tapped to mount either style of exhaust, but I guess not.
#9
Supreme Member
iTrader: (5)
Join Date: Feb 2002
Location: N. Illinois
Posts: 3,461
Likes: 0
Received 4 Likes
on
3 Posts
Car: 92 GTA/ 00 TA
Engine: 383/350
Transmission: 700R4/T-56
Re: summit SUM-G9005 headers
I believe you're right. Both my 88 and 92 heads had both holes drilled and tapped. Maybe his heads were changed.
Thread
Thread Starter
Forum
Replies
Last Post
Chad Speier
Engine/Drivetrain/Suspension Parts for Sale
3
09-24-2015 12:32 PM
[GA] Shorty headers
Night rider327
Engine/Drivetrain/Suspension Parts for Sale
0
09-16-2015 02:20 AM