1973 K20 Muffler Size - The 1947 - Present Chevrolet & GMC Truck Message Board Network

TheWhiteElephant · 02-06-2011, 01:24 AM

I have decided on a pair of Dynomax Super Turbos for my 1973 K20. I am running 2.5 inch ram's horns. I've gotten a couple of estimates from 2 muffler shops for $340 for the mufflers, aluminized pipe, gaskets, and hangers, that will have turn downs ahead of the rear axle.

I'm trying to see if it would be less expensive for me to purchase the mufflers from Summit and then have the shop do the rest. Anyone know what the OEM size for the mufflers on these trucks is? Also, I'm assuming I have to get the 2.5 inch inlet/outlet, correct?

Any thoughts would be appreciated.

02-06-2011, 01:24 AM	#1
TheWhiteElephant God is good! Join Date: Sep 2010 Location: Texas Posts: 689	1973 K20 Muffler Size I have decided on a pair of Dynomax Super Turbos for my 1973 K20. I am running 2.5 inch ram's horns. I've gotten a couple of estimates from 2 muffler shops for $340 for the mufflers, aluminized pipe, gaskets, and hangers, that will have turn downs ahead of the rear axle. I'm trying to see if it would be less expensive for me to purchase the mufflers from Summit and then have the shop do the rest. Anyone know what the OEM size for the mufflers on these trucks is? Also, I'm assuming I have to get the 2.5 inch inlet/outlet, correct? Any thoughts would be appreciated. __________________ Mando *"It takes a smart man to know when he's stupid." -- Barney Rubble* My build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=430367

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