are my eyes deceiving me that injector/valve don't look like a pc type it looks like a pencil injector ?.somethin ain't right about that top picture in post #14 i may be crazy it looks like a direct injector in a pc housing . someone tell me if iam wrong please .a pc valve should seat near the threaded end of pc chamber if iam correct that injector is way above that area, and yes you can't beat original cat parts,that bad chamber looks like it was defective from the get go, maybe over torqued or most likely (water corrosion) also it looks like it broke where one of the o rings mounts it may have been machined too much it looks very thin there , put in what you can afford $35.00 as. too $210.00 is quite a difference, a $40.00 head gasket and 4 new chambers and be done with it,also try too use cat o rings if you can , the head should be o.k. there built very robust, fest