header size

Rex Thonen · 03-28-2013, 09:39 PM

Are 2 1/8 " headers to big for a 396 in stock?

Alan Roehrich · 03-28-2013, 11:03 PM

Probably. Especially if it has the 401 aluminum heads. The best 4 into 1 header would be a 1-7/8" to 2" to 2 1/8" Stahl. About 30" to 32" long, with a 3" to 4" merge collector about 15-1/2" long. A 2-1/8" header would work for a 427, but probably not for a 396. It would probably hurt torque too much for a 396, especially if it was in front of an automatic.

1320racer · 03-29-2013, 08:02 AM

way too big!

03-28-2013, 09:39 PM	#1
Rex Thonen Junior Member Join Date: Nov 2002 Location: Nebraska Posts: 29 Likes: 3 Liked 0 Times in 0 Posts	header size Are 2 1/8 " headers to big for a 396 in stock?

03-28-2013, 11:03 PM	#2
Alan Roehrich VIP Member Join Date: May 2006 Location: Murfreesboro TN Posts: 4,968 Likes: 1,117 Liked 1,217 Times in 312 Posts	Re: header size Probably. Especially if it has the 401 aluminum heads. The best 4 into 1 header would be a 1-7/8" to 2" to 2 1/8" Stahl. About 30" to 32" long, with a 3" to 4" merge collector about 15-1/2" long. A 2-1/8" header would work for a 427, but probably not for a 396. It would probably hurt torque too much for a 396, especially if it was in front of an automatic. __________________ Alan Roehrich 212A G/S

03-29-2013, 08:02 AM	#3
1320racer VIP Member Join Date: Nov 2007 Location: New Jersey Posts: 1,871 Likes: 81 Liked 501 Times in 238 Posts	Re: header size way too big!