Best Cathedral Port Heads

We can customize these specifications and components to your application just give us a call at 812 576 2371. Available in runner volumes from 210cc 215cc 230cc and 245cc. Tested on a flow bench the 799 head offered right at 249 cfm at 700 lift on the intake and 191 cfm on the exhaust.

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Mast Motorsports Ls1 225 Cathedral Port Heads Are Designed For Getting The Most Out Of Your Ls1 Or Ls2 Engine If You Are Lo Cylinder Head Cylinder Motorsport

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Were we to compare two sets of production heads there would be little comparison as even the very best production cathedral port ls6 heads 243 castings offer nowhere near the flow and power.

Best cathedral port heads.

The best factory cathedral port heads 243 799 and 317 castings flowed near 250 cfm which represented a huge step up from the conventional small block heads that preceded them. The price listed is for you sending your cathedral port cylinder heads 4 8 5 3 ls1 ls6 ls2 lq4 9 to us for porting. All heads come with high quality components such as titanium retainers and pac racing springs. Our stage 1 porting service will include the re use of the stock vales.

Bes all pro cathedral port heads. Component upgrades and different machining options are available to customize your afr heads for your specific build. Stage 2 5 will include aftermarket 2 02 1 57 stainless steel valves. Victory inconel exhaust valves.

Afr s mongoose ls1 cathedral port cylinder heads are 100 5 axis cnc ported and made with a356 aluminum. Prc cnc porting machining service includes. With the bore size a concern we selected a 6 0l truck block but instead of relying on the stock internals we upgraded to a stroker assembly from procomp electronics and probe industries. Both ports weigh in at 211 ccs.

The afr 245 cathedral port heads used in this test stepped things up even further with peak flow numbers of 349 cfm enough to support more than 700 hp. A comparison of eq s cathedral port intake port windows revealed the 317 casting left to be 3 19 x 0 965 while the 243 unit was 3 149 x 1 035. Essentially a 243 head with different casting numbers the 799 243 heads are considered to be the top of the line factory cathedral port offerings. Aside from the lq9 which is a copy of the ls6 these are the best performing of the oem cathedral ports.

We also offer valve spring upgrades. The afr 245 cathedral port heads used in this test stepped things up even further with peak flow numbers of 349 cfm enough to support more than 700 hp. Our best flowing cathedral port head when rules require cathedral ports. The ls6 was designed specifically by gm to surpass the ls1 as the best performance head and it did such a good job that the 243 casting was recycled on the ls2.

With the bore size a concern we selected a. Victory titanium intake valves. It should be pointed out that the 799 head featured a 2 0 1 55 valve combination.

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