X-Mozilla-Keys:                                                                                 
Brian D. Cain wrote:

Paul and Brent, there were two different models of Cosmo engine.
The chassis names are JC3S and JCES.  The engines were the
20BTT and the 13BTT; both utilizing a sequential turbocharger setup
although slightly different than the 13BREW (3rd generation Rx7)
turbocharger pair.  I believe the internals are quite similar to the
refinements of the 13BREW block, although the intake ports are
*much* larger.

I'd like to get a hold of one of the 13BTT blocks myself.

B

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