From this point on, its all the reverse of the previous steps. Firmly press all the injectors back into the intake manifold, one side at a time. Make sure they are in GOOD, then put the 4 bolts in that hold the rail down (making sure the metal brackets went on like they came off). Next, re- insert the 4 rear long intake manifold bolts back into the manifold (remember, the drivers side rear of the manifold has a metal bracket that is held in place by the rear 2 bolts on that side) and while holding them up, slide the manifold back into place. Reconnect the rear sensor, as well as the small vacuum line, and snake the big brake booster line back into place and reconnect it. Once everything in the back is reconnected, slide the manifold into place until those rear 4 bolts are perfectly lined up. MAKE SURE you don't catch any small vacuum lines underneath the intake manifold before you bolt it down.
![Ls1 Intake Manifold Install Ls1 Intake Manifold Install](http://image.gmhightechperformance.com/f/tech/lsx_engine/0608gmhtp_ls1_intake_manifold_throttle_body_cold_air_intake_upgrade/27501712/0608gmhtp_06_o%2bls1_intake_manifold_throttle_body_cold_air_intake_upgrade%2bfuel_injectors.jpg)
![Ls1 Intake Manifold Install Ls1 Intake Manifold Install](http://i2.wp.com/my.prostreetonline.com/wp-content/uploads/2014/08/how-to-install-ls1-fuel-rail83.jpg?resize=640%2C360)
Intake Manifolds: F.A.S.T. Plus, the manifold can handle the high intake pressures of nitrous or blower systems. 1-630-377-6937. LS1 INTAKE MANIFOLD P/N 300-111 (Aluminum) P/N 300-111P (Polished) NOTE: These instructions must be read and fully understood before beginning.
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I forgot to check on one install and the pinched vacuum line left me without A/C controls. Having to go back in and replace vacuum line because of a stupid mistake sucks.
![Ls1 Intake Manifold Install Ls1 Intake Manifold Install](http://image.gmhightechperformance.com/f/tech/lsx_engine/0608gmhtp_ls1_intake_manifold_throttle_body_cold_air_intake_upgrade/27501847+w799+h499+cr1+ar0/0608gmhtp_22_o%2bls1_intake_manifold_throttle_body_cold_air_intake_upgrade%2bcast_aluminum_intake.jpg)
![Ls1 Intake Manifold Install Ls1 Intake Manifold Install](http://ls1tech.com/forums/attachments/generation-iii-external-engine/295420d1305259996-bbk-ssi-manifold-install-dsc00640resize.jpg)
Now, hand thread in all 1.
Intake Manifold Kit | Chevy LS1. Accufab is now offering selected Edelbrock EFI intake manifolds equipped with Accufab throttle bodies for your Chevy LS1. ©2012 Edelbrock LLC Page 1 of 4 Brochure #63-0256 Catalog #7118 Rev. A - 01/12 - CP/mc CARBURETED PERFORMER RPM LS1 INTAKE MANIFOLD For GM 5.7L LS1 V8 Engines. Installing intake manifold? This is a discussion on Installing intake manifold? within the General Help forums, part of the LSx Technical Help Section category; I.