Turbo bolt pattern - W x H
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T3 ---------- 86mm x 45mm
T4 ----------- 83mm x 70mm
CT26 -------- 70mm x 80mm
Nissan T25 73mm x 40mm
TD006--------3-bolt - 65mm C. to C.
TD08 down pipe 4.1" square x 3/8" thick.
3" ID center hole
4 - .415 bolt holes (10mm plus clearance) on a 4.185" B.C. (square pattern).
K24-26 ---------- 76mm x 38mm
K27/28 ---------- 86mm x 44.5mm
Apex ---------- 73mm x 33.5mm