Big block Chevy 454 into 69 GTO , what headers?

Asked by TheTwistedwrench Feb 26, 2020 at 01:21 PM about the 1969 Pontiac GTO

Question type: Car Customization

I am installing a big block chevy 454 into a 69 gto. Can anyone tell me what headers will fit?

6 Answers

Chevelle headers will probably work. Why ruin a nice GTO by putting the wrong engine in it?

The engine is 700 hp plus 13:1 compression and needs full length headers for performance. The car already had been changed once to an ls and debate is not the question. The customer wants what he wants. So I appreciate any help with information.

With that amount of heat I would get a good quality ceramic coated set. 13/1? Are you building this engine for E85? Any good hot rod supplier can fix you up with the correct headers.

I disagree with Ed on headers. With the right tail pipes and mufflers you can have almost any level of HP. I would use 3" pipe. Using cast iron manifolds would lose you a lot of power at the top end.

I appreciate all of your help. I however am running a race motor , and yes manifolds will drop the overall power by 75 hp. But my question is not if i can have custom headers made. I know manifolds and shorties will fit and I know a chevelle is very similar . I am curious if anyone knows for sure and has an actual part number that would work for full length headers.

Chevelle headers won't work without a lot of modifications . Steering shaft issues on the driverside and cross-member issues on the passenger side.

Your Answer:

GTO

Looking for a Used GTO in your area?

CarGurus has 2 nationwide GTO listings and the tools to find you a great deal.

Postal Code:

CarGurus Experts

  • #1
    Rucko
    Reputation
    870
  • #2
    Norm Davis
    Reputation
    780
  • #3
    taver91
    Reputation
    750
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Camaro
25 Great Deals out of 511 listings starting at $11,500
Used Chevrolet Corvette
29 Great Deals out of 593 listings starting at $10,989
Used Ford Mustang
61 Great Deals out of 1,603 listings starting at $6,500
Used Pontiac Firebird
17 listings
Used Dodge Challenger
35 Great Deals out of 886 listings starting at $1,001
Used Dodge Charger
36 Great Deals out of 983 listings starting at $4,888
Used Chrysler 300
28 Great Deals out of 550 listings starting at $2,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.