396 427 CID 3981591 HEADER PIPE UNIT side mount system Corv Y 1 3981592 HEADER PIPE UNIT side mount system co 4 3 2 3893617 HEADER ASSY L H used w regular exh e i 1 389361 8 HEADER ASSY R I I used w yegulay ex 1 1 3960709 HEADER ASSY L H side mount system 1 3960710 HEADER ASSY R H side mount system 1 ett 1 y 3960713 COLLECTOR ASSY L I f use w 3960709 orve 7 1 y 3960714 COLLECTOR ASSY R H use w 3960710 Cor 4 J 3910287 PIPE ASSY L H use w 3893617 Corvette J 1 3910288 PIPE ASSY R H use w 3893618 Corvette 1 3977899 MUFFLER EXE I side mount system Corvette y 3960712 GASKET Header to Block Corvette 3960711 BOLT Header Corvette l 16 K 327 350 cio z 1 5 J 3983339 HEADER PIPE UNIT L H side mount sy C e 1 1 i 3983340 HEADER 6 PIPE UNIT R H side mount Corvette 3 3977971 HEADER ASSY L H side mount system Corvette y J i 3977972 HEADER ASSY R H side mount system Corvett 3 1 3960713 COLLECTOR ASSY L I I usa w 3977971 C0f i 1 I 3960714 COLLECTOR ASSY R H use w 3977972 Co t 1 E A 397 78gg MUFFLER EXh Side mguntizgygtgm F 2 I A i 3977970 GASKET Header to Block 2 l y 39607 ll som 1 1eedeE 5 6 3 16 j 1 3 EXHAUST SYSTEM l W I A satisfactory tuned open exhaust system is manda ory for extract V 5 I Q ing maximum torque and horsepower from engines Small Block V 8 uses 1 3 4 0 D x 30 head pipes collected i in a group into 3 1 4 to 3 1 2 collector or tailpipe Fuel injected or Weber carbureted engines respond favo g Q to l 7 8 O D x 32 to 34 head pipes and 3 1 2 to Ota pipe 3 Large Block M 4 uses 2 O D x 36 head p es ted H a I group into 3 l 2 to 4 collector or re Founi inch l no tailpipes are preferable where the tai more than 36 long Fuel injected engines re fa k 1 8 O D x 36 to 40 head pipes I Q J I L 39 I U I 11 16 70 1 Z 11 I Y I