Loaded LS7 intake, fuel rails, injectors, throttle body $350
https://www.summitracing.com/parts/nal-12644568/?rrec=true

Loaded LS3 intake, fuel rails, injectors, throttle body $893
https://www.summitracing.com/parts/nal-12674428

LS3 intake no parts $215
https://www.summitracing.com/parts/ado-12686561?seid=srese1&gclid=EAIaIQobChMIjYj-zuOh5AIVw5JbCh2r7gYuEAQYASABEgId6fD_BwE

So.... Can I buy a loaded LS7 intake and swap the rails, throttle body, injectors etc onto an LS3 intake?
Im still money ahead and have a 93mm throttle body.

Will the parts physically bolt up, any issues with 93mm throttle body on LS3/L76 intake. Can i get a tune on this. What MAP sensor. Im building an LY6.

Am I crazy, well, yes. But, will it work?

 

LS3
Fuel injector 12576341
Fuel rails 12572174, 12633511
Map 12591290, 2133842, 55573248, 93192107

LS7
​Fuel injector 12576341
Fuel rails 12569124, 12633513
Map 1261801, 2144410





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Seriously doubt that it would work.

Mystified as to why you'd want to try it.

KW

 

I don't believe the LS7 rails will work on the LS3 intake. When I bought an LS7 style MSD, I had to buy LS7 rails as I was told LS3 rails would not work - IIRC it was said the injector angle was different.

 

Rails are totally different. You cannot swap them.

 

Thanks for the feedback guys, the price on the LS7 had me excited.

 

Youre right, why would we ever try anything new.

Looking for the best combo of parts. If you do the math, the combo would have been around $550 for the whole set up VS. $900 for a loaded LS3.

I picked up a new take off LS3 without throttle body since I started the thread. Time to decide - stock or aftermarket TB.