The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Anyone using Doug Thorley 323Y-C headers?

Billett · 04-10-2014, 04:05 PM

I run the 1-7/8s. I did a bit of reading around the old interwebs and honestly, if you plan on staying stock or mild the 1-5/8s are a much better fit. You may gain some top end power with the larger primaries but you lose a ton under the entire curve.

04-10-2014, 04:05 PM	#12
Billett Registered User Join Date: Jun 2012 Location: Pittsgrove, NJ Posts: 1,502	Re: Anyone using Doug Thorley 323Y-C headers? I run the 1-7/8s. I did a bit of reading around the old interwebs and honestly, if you plan on staying stock or mild the 1-5/8s are a much better fit. You may gain some top end power with the larger primaries but you lose a ton under the entire curve. __________________ Will 1968 C10 - Project Texa Go 6.0/4L80e 2003 Mitsubishi Lancer Evolution 2002 Ford Excursion 7.3L 2024 Toyota Sienna