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|This product doesnt fit any of your saved vehicles||Check Fit for another vehicle|
|Collector Port Diameter:||2.5 in|
|Gasket Or Seal Included:||No|
|Mounting Hardware Included:||Yes|
|Tube Size:||1.75 in|
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Q:is this a 16 valve manifold
A:I'm happy to help! Exhaust manifolds and headers are designed based on the number of cylinders which would equal the number of ports. These Flowtech Exhaust Manifold/Headers (Part No. 11030FLT) are designed to fit GM V8 engines ranging from 396 cubic inch displacement to 454 cubic inch displacement. The tubing is 16-gauge mild steel.
Q:Does this manifold have the hole for the o2 sensor on the one for the passenger side?
A:Hi Mike, good question! No, this exhaust manifold does not have the hole for the Oxygen sensor on the passenger side header.
Q:Will these headers fit a 1979 403 oldsmobile engine?
A:Happy to assist, Richard! This exhaust header is universal and is designed for custom installations utilizing a Chevrolet 396-454 big block V8 engine.