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M-6049- X303/X305/Y303 GT-40 …
https://performanceparts.ford.com/download/instructionsheets/FordInstShtM-6049-X303X305Y303.pdf
SVO Ford Motorsport Turbo Swirl M 6049 Y 303 …
https://www.ebay.com/p/1827543464
item 3 Complete Aluminum Cylinder Heads SBF FORD GT40 289 302 351W 175cc 62cc 2.05/1.60 3 - Complete Aluminum Cylinder Heads SBF FORD GT40 289 302 351W 175cc 62cc 2.05/1.60. ... item 5 1987-1995 Ford Mustang 5.0L Ford Racing GT40Y Aluminum Cylinder Heads COBRA 302 5 - 1987-1995 Ford Mustang 5.0L Ford Racing GT40Y Aluminum Cylinder Heads COBRA 302.
SVO Y303 heads | GT40s
https://www.gt40s.com/threads/svo-y303-heads.26544/
The Y303 SVO head is the one used on the 320HP crate motor sold by Ford before they started putting the X303 head on them and selling them as 345HP motors. They have the same valves and springs in them as the X head 1.94 intake and 1.54 exhaust valves. The springs will run out of gas at about 5600 RPM's.
For Sale: - Ford racing y303 heads (SOLD) | Factory Five Racing …
https://www.ffcars.com/threads/ford-racing-y303-heads-sold.204028/
Used ford racing y303 heads. 1.94/1.54 valves.160cc intake runners,53cc exhaust, 64cc chambers. these heads have about 3500 miles.$750 shipped
Y303 Heads | Ford Muscle Cars Tech Forum
https://www.fordmuscleforums.com/threads/y303-heads.443456/
All Ford Techboard. Y303 Heads. Jump to Latest Follow 1 - 4 of 4 Posts. 6. 64ranchero · Registered. Joined Jan 1, 2003 · 63 Posts . Discussion Starter · #1 · Feb 4, 2005 ...
Installed a new Ford Racing shortblock with Y303 heads...
https://www.allfordmustangs.com/threads/installed-a-new-ford-racing-shortblock-with-y303-heads-and-not-feeling-the-power.33850/
isn't the y303 heads with the 2.02/1.60 valves. that might be the problem, a litle too much air flow killing your torque if the block is a 302. changing the postion of the chain will chang where the power kicks in, i usually hear of reatarding the cam 2-4* so the power kicks in earlier. try play with the timing as well, try 14*. also does the car have gears?
M-6049- X303/X305/Y303 GT-40 Aluminum Cylinder …
https://static.summitracing.com/global/images/instructions/fms-m-6049-y303.pdf
FORD RACING PERFORMANCE PARTS IS-1850-0029 Page 1 of 3 Tech “Hot Line” (586) 468-1356 Factory Ford shop manuals are available from Helm Publications, 1-800-782-4356 ... M-6049-Y303/X303/X305 Cylinder Head Assembly* ADDITIONAL PARTS RECOMMENDED FOR INSTALLATION: M-6051-A50 Head Gasket Kit
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