[pooder]

Thanks all for your input. Brian at Rarly8 has been very responsive to my inquiries and has informed me that for my intended use that emphasizes mid range torque over max HP, that 1.63 inch headers with long tube primaries are what I would need and these are not available with heat. The medium length tube headers move everything up the RPM curve - not what I am looking for. Will go with the SSI's.