C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

EGR System when changing to headers

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Old Jul 15, 2025 | 02:44 PM
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Default EGR System when changing to headers

I know this has been covered here a hundred times, but the discussions keep deviating from the key problem.

I want to change out the stock manifolds in my 1985 C4 with long tube headers. No aftermarket headers appear to have those connections to the EGR System runner pipes on the sides of the engine. If I have to lose those pipes off the manifold, I pretty much have to do an EGR delete, correct?

Thanks in advance,
Arbix
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Old Jul 15, 2025 | 07:13 PM
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You will have to lose the AIR pump
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Old Jul 15, 2025 | 10:33 PM
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EGR is completely different, it's on the passenger side head. The manifold tubes are part of the smog pump system
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Old Jul 16, 2025 | 07:12 AM
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On the iron headed small blocks (vortec not included) the egr gets exhaust from the crossover port in the intake manifold. You must be thinking of the A.I.R. tubes on the manifolds/headers.
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