Exhaust Crossover Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rick0312 · 03-31-2008, 07:16 PM

My intake gasket is supplied with these metal inserts. I assume these are for restricting the exhaust crossover port in the head. Do you guys leave this port open, closed or restricted?

Wrenchbender Ret · 03-31-2008, 07:39 PM

Leave them out. They are for the heavy duty trucks.

rick0312 · 03-31-2008, 07:55 PM

will do.......thanks!

Green Machine · 03-31-2008, 10:16 PM

Put them in !!! You need may need some heat up there but not that much, some block them off altogether for cooler intake, I think the restrictor is a happy medium betweeen blocked off and wide open. What intake are you running ? JMHO.

rick0312 · 04-01-2008, 05:23 AM

i am running a performer intake.

lilred67 · 04-01-2008, 04:45 PM

i restricted mine. i am using an eldelbrock eps manifold.

03-31-2008, 07:16 PM	#1
rick0312 Registered User Join Date: Jan 2006 Location: Warrington, PA Posts: 403	Exhaust Crossover Question My intake gasket is supplied with these metal inserts. I assume these are for restricting the exhaust crossover port in the head. Do you guys leave this port open, closed or restricted? Attached Images __________________ 69 C10 LWB GM 350 crate motor, 3.73 rearend

03-31-2008, 07:39 PM	#2
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,229	Re: Exhaust Crossover Question Leave them out. They are for the heavy duty trucks.

03-31-2008, 07:55 PM	#3
rick0312 Registered User Join Date: Jan 2006 Location: Warrington, PA Posts: 403	Re: Exhaust Crossover Question will do.......thanks! __________________ 69 C10 LWB GM 350 crate motor, 3.73 rearend

03-31-2008, 10:16 PM	#4
Green Machine Senior Member Join Date: Jul 2004 Location: Estherville, Iowa Posts: 3,371	Re: Exhaust Crossover Question Put them in !!! You need may need some heat up there but not that much, some block them off altogether for cooler intake, I think the restrictor is a happy medium betweeen blocked off and wide open. What intake are you running ? JMHO. __________________ 1968 C10 307 3spd Long Fleet ------ http://67-72chevytrucks.com/vboard/s...d.php?t=201103 1970 C10 305 Super T10 Long Fleet --- http://67-72chevytrucks.com/vboard/s...d.php?t=202285 1971 C20 383 TH350 Dana Posi ----- http://67-72chevytrucks.com/vboard/s...d.php?t=206894 2001 GMC Sierra 1500 C3 6.0 Last edited by Green Machine; 03-31-2008 at 10:17 PM.

04-01-2008, 05:23 AM	#5
rick0312 Registered User Join Date: Jan 2006 Location: Warrington, PA Posts: 403	Re: Exhaust Crossover Question i am running a performer intake. __________________ 69 C10 LWB GM 350 crate motor, 3.73 rearend

04-01-2008, 04:45 PM	#6
lilred67 Senior Member Join Date: Mar 2005 Location: weatherford,texas Posts: 1,003	Re: Exhaust Crossover Question i restricted mine. i am using an eldelbrock eps manifold.



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