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LTX and LSX Putting LT1's, LS1's, 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.

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Old 08-07-2007, 04:41 PM   #1
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L99 and LT1 questions

I need to know if the intake, fuel rail, wiring harness, sensors, and throttle body was the same from an L99 to an LT1. I tried a search but got confusing answers. (I want to swap those parts from an L99 to an LT1 that doesnt have them.)

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Old 08-07-2007, 07:25 PM   #2
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Re: L99 and LT1 questions

Thw L99 is V-6 IIRC the intake,fulerail<-- NO.I dont know the size of the tb but I would bet no. Some sensors mabey,wiring???? dono about that one.
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Old 08-07-2007, 07:56 PM   #3
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Re: L99 and LT1 questions

no, its not. Its a 4.3L V8 aka the "baby lt1".
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Old 08-09-2007, 01:37 PM   #4
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Re: L99 and LT1 questions

I believe the knock sensor might be different. The rest should be the same. I know the intake and rails will swap right over.
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Old 08-09-2007, 02:00 PM   #5
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Re: L99 and LT1 questions

keep in mind the smaller displacement will have smaller injectors and probably a smaller tb. but thats no big deal to change
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Old 08-09-2007, 02:00 PM
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