MN12 Is Installed : D
https://ls1tech.com/forums/manual-transmission/778044-mn12-98-firebird.html
The Interals Are Different , But Just Because They Are Better , But As Far As Bolting Up They Are The Same And Work The Same.
The M12 Is Same Specs As Your M6 Exept For Gears Are Taller , And The Shifter Cup Is Different. Witch You Can Just Take Your Cup Out Of You M6 And Put It In The M12 Other Than That Is Bolt On And Go! The M12 Is A Way Better Built Tranny Than The M6 . So All You Guys Wanting To Know Yes It Will Fit Right In Your Car . 6 Speed Inc Sells Them And They Are Rated At 700 Hp And 700flbs Tq And They Are Ready Go Go When You Get It For 2250 And Then You Can Send Your Core In For 500 Return So 1750 And You Are Good To Go!

