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I have a 1991 Trooper, LS I have put a hi-flow 2.5ö exhaust, a throttle body spacer, and put injectors in from a 4.3. Currently the engine is being rebuilt. Overview: three angle grind, bored out pistons, slight upgrade cam shaft w/ adjustable Edelbrock sprocket, roller (tip) rockers, bored out a few other things. IÆm also putting in a new clutch for good measure. Any suggestions about this, has anyone had luck re-mapping the ignition with a jet chip?

Question1:
I searched the archives and it would appear that no V6 headers exist for this engine. Any further developments?

Question2:
K&N and airRaid do not make air intakes for this engine. Other than a custom job, anyone have any ideas on getting a cone filter in there? There is not much room after the throttle body spacer.

I welcome any suggestion or comments.


well, first I beg you to never, ever use a K&N or similar Dust Ingestion System or other gauze filter. Second, read this before blindly abandoning the factory style filter. http://www.bobistheoilguy.com/airfilter/airtest2.htm

Presumably you can avoid up to 0.018psi of power-robbing restriction!! That's like installing a 0.018psi supercharger! OMFGWTFBBQVCR!!!!ONEONE!!