Header tube size
Le Mans Master
Joined: May 2007
Posts: 5,393
Likes: 17
From: Belleville Mich.
Really don't think the 1-78 headers will be any more noisier than the
1-3/4's.
However, If your at stock HP levels, I would suggest the smaller diameter headers for ease of installation.
Good luck.
1-3/4's.
However, If your at stock HP levels, I would suggest the smaller diameter headers for ease of installation.
Good luck.
Safety Car
Joined: Nov 2000
Posts: 4,549
Likes: 30
From: Shenandoah Valley Virginia
The 1-3/4" headers are designed for stock cube engines that are lightly modified - cold air and maybe a cam. They keep the proper amount of back pressure to make everything flow and work properly. The 1-7/8" headers are designed for big cube motors, head/cam motors and forced induction that need to flow more exhaust to achieve max HP and torque. Use 1-7/8" on a mildly modified or stock motor and you will not achieve much in the way of HP gain and will probably hurt your torque figures. Talk to the guys at L.G. Motorsports or American Racing Headers about your specific application to get a recommendation. No difference in noise levels from one size to the other, they both are going to be louder than stock.
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
The 1-3/4" headers are designed for stock cube engines that are lightly modified - cold air and maybe a cam. They keep the proper amount of back pressure to make everything flow and work properly. The 1-7/8" headers are designed for big cube motors, head/cam motors and forced induction that need to flow more exhaust to achieve max HP and torque. Use 1-7/8" on a mildly modified or stock motor and you will not achieve much in the way of HP gain and will probably hurt your torque figures. Talk to the guys at L.G. Motorsports or American Racing Headers about your specific application to get a recommendation. No difference in noise levels from one size to the other, they both are going to be louder than stock.
1 3/4" tubes -larger ones are best suited for larger cudes or big cams where you consistantly run above 6500 RPM's Too large a tube size when not required will kill off some bottom end TQ---
