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A-Body
+3
Thornton Small Block Chevy Headers
1199
$299.00
In stock
1
Product Details
NO LONGER AVAILABLE!!
Unfortunately, Thornton products cannot be shipped to Alaska, Hawaii, or Canada without prior authorization. Please call before ordering if you live in those areas!
New Thornton shorty header design for Small Block Chevys. Thornton style headers are designed for easy fit without the hassle of exhaust leaks.
These headers were designed from 1969 Camaro cast iron GM manifolds 3942529 and 3932376 and are a stock replacement for factory manifolds. They will A, F, G and X body bodies, Chevelle, Camaro, Z28, Nova, Malibu, El Camino, 4 speed and automatic cars with or without air conditioning.
These headers will fit in the same cavity as factory exhaust manifolds. JUST USE BIGBLOCK 2.5" DOWNTUBES TO CONNECT TO YOUR EXHAUST!
Mini starter is not needed. 1 5/8" primary tubes, 3" collector with factory fit 2.5" exit flange (same as big block) with stock style exit flange and fits standard stock big block down pipe.
They work with factory heat riser valve.
They work with air conditioning and power steering & alternator.
Stock style exit flange with 3 bolt design with dounut gasket for no leak design. They use stock big block down pipes.
Thick, flat flange at cylinder head that will not warp, no leaks.
They are designed to fit in tight spaces, same as the stock manifolds.
Exit flange is located in same spot as the original but with a much larger design.
Watch the video for installation instructions!
A shorty spark plug
is needed, this is common for headers.
DRIVERS SIDE:1-
Remove dipstick tube. 2-
Install shorty spark plugs #1, 3, & 7. 3-
Install header from the top and then install plug #5.
PASSENGER SIDE:1-
Install all 4 shorty spark plugs. 2-
Install header from the top.
***NOTE- X-Body & 1st Gen F-bodies with A/C will have clearance issues with the evaporator case. Modifications will be necessary for proper clearance!
Shorty spark plugs are necessary!
The only minor modifications needed are on A/C and P/S brackets, and a slight dimple may be needed on the #3 tube for the #7 plug.
