Web3-1 Long-Tube Headers by Doug Thorley Headers®. Doug's headers are designed to outflow your stock exhaust manifolds by leaps and bounds. ... Doug Thorley Headers® 4-2-1 Tri-Y Headers. 1 # sp240914. 4-2-1 Tri-Y Headers by Doug Thorley Headers®. This product is made of high-quality materials to serve you for years to come. Designed using state ... WebJun 13, 2003 · Tri Y's work well with low overlap cams and really boost the bottom end..mid range gains can be impressive +50 FT/LB's on some engines. Long overlap cams build …
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WebJul 28, 2010 · Jamie told us that historically, most shorty header designs were only capable of offering horsepower and torque improvements from mid-range rpm’s onward. However, the Doug Thorley short tube headers were designed in a tri-y configuration that works to maintain a constant power increase throughout the entire power band. WebApr 10, 2024 · Find many great new & used options and get the best deals for Tube Stainless Steel Manifold Headers For 64-70 Ford Mustang 260/289/302/351 V8 at the best online prices at eBay! ... Stainless Steel Manifold Header For 64-70 Mustang 260/289/302 V8 Tri-y Header. ... Free shipping. FOR Ford Sb 289 302 351 Windsor Mustang 64-70 Long Tube … teal antler hours
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WebJun 14, 2010 · #2 · Jun 7, 2010 Tri-y's were my first mod, gains were noticeable right away in the low to mid range around 1500-4500rpm, the truck pulled better on take off. They pull better than the stock manifolds in the upper rpms too IMO. furnace mstr Registered Joined Sep 21, 2009 206 Posts #3 · Jun 7, 2010 i wish i had some....they would be my first choice. WebNov 6, 2009 · What are the best headers to use Long Tube or TRI Y. In the future a cam and aluminum heads will be next. I have a Spintech cat back exhaust system and a CIA cold air intake.. PAUL R DUMDIE JR. HERD546 ISSCA 2158 W9DWP AZISSO 460 www.theherd.com 1996 DGGM IMPALA SS 1995 BLACK Carprice SS WAGON SOLD.. 1992 Dk Gray Caprice … WebJun 16, 2024 · The long primary tubes reduce the chance that you will have back-feed of gases into a different tube. These headers help to produce the most overall power with a … south side music hall capacity