LTX and LSX Putting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.

WilWill 305 exhaust manifolds go in a 3rd gen after the lt1 swap?

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Old 06-22-2014, 12:53 PM
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WilWill 305 exhaust manifolds go in a 3rd gen after the lt1 swap?

Without having to take the motor mounts or anything else loose?
Old 06-25-2014, 11:52 AM
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Re: WilWill 305 exhaust manifolds go in a 3rd gen after the lt1 swap?

Yes they should bolt up, BUT LT1 heads have a D shaped exhaust port while the 305 uses more of a rounded off square shape.
And 305 manifolds dont flow well, especially TBI manifolds, they'll kill performance even on the 305, definitely will on the LT1.
Do yourself a favor and get some nice headers for your LT1, pretty much any third gen V8 header will be better than 305 manifolds.
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