3inch collector l/t's going into 2.5inch H-pipe??

Black1987Stang · Aug 23, 2008

Will 351 swap long tubes with a 3 inch collector connect right up to the 2.5inch h-pipe I'm using for my 306?...they both have a ball and socket flange....Do they use the same size flanges or will one not fit in the other?

Thanks

5spd GT · Aug 23, 2008

BBK has 3.00" collectors, but the ball and socket measure around 2.3-2.4", for improved seal.

Measure the ball and socket opening.

N8Miller · Aug 23, 2008

5spd GT said:
BBK has 3.00" collectors, but the ball and socket measure around 2.3-2.4", for improved seal.

Measure the ball and socket opening.

this is the 2nd thread that you said that on, but again, its 2.5" collectors.

you may have to use an adapter when your bolting up the exhaust, but if i was you, i would just try to find a 3" mid pipe from MAC or DR gas.

5spd GT · Aug 24, 2008

Talk to Bryan Rogers.

Going off memory, it is 3.00" as well when I had mine.

It will be in many more threads Nate.

1991vert · Aug 24, 2008

open it up to match your midpipe. i dont see any reason needing 3" anything for exhaust for that setup.

edit: i just noticed you want to use 351 headers on a 306...why not just get headers that are made for your 306?

N8Miller · Aug 27, 2008

from the summitracing website:

BBK Performance 1516

$299.99
Estimated Ship Date: Today
Overview Application Suggested Parts Warranty
Show All
Brand: BBK Performance
Product Line: BBK Full-Length Headers
Part Type: Headers
Part Number: BBK-1516
Header Material: Steel
Header Finish: Chrome
Header Style: Full-length
Primary Tube Diameter (in): 1 5/8 in.
Collector Attachment: 2-bolt flange
Collector Diameter: 2.500 in.
Tuned: No
Primary Tube Gauge: 16-gauge
Flange Style: Standard
Flange Thickness (in): 3/8 in.
Bolts/Studs Included: Yes
Gaskets Included: Yes
Reducers Included: No
Y-Pipe Included: No
Quantity: Sold as a pair.

Black1987Stang · Oct 4, 2008

Those BBK ones are looking pretty good right now for the price, will I lose alot of top end torque with the 1 5/8 and 2.5 inch collector rather than the bigger size?

5spd GT · Oct 5, 2008

N8Miller said:
from the summitracing website:

BBK Performance 1516

$299.99
Estimated Ship Date: Today
Overview Application Suggested Parts Warranty
Show All
Brand: BBK Performance
Product Line: BBK Full-Length Headers
Part Type: Headers
Part Number: BBK-1516
Header Material: Steel
Header Finish: Chrome
Header Style: Full-length
Primary Tube Diameter (in): 1 5/8 in.
Collector Attachment: 2-bolt flange
Collector Diameter: 2.500 in.
Tuned: No
Primary Tube Gauge: 16-gauge
Flange Style: Standard
Flange Thickness (in): 3/8 in.
Bolts/Studs Included: Yes
Gaskets Included: Yes
Reducers Included: No
Y-Pipe Included: No
Quantity: Sold as a pair.

Long Tube Headers Choices with a 3" collector - Corral Forums

Read post #7, #10, and #17.

Bryan Rogers has also told me they are 3.00". I had some and they were 3.00".

3inch collector l/t's going into 2.5inch H-pipe??

Black1987Stang

Active Member

5spd GT

"the 5.0 owns all"

N8Miller

I need NOS....make it 2 of the big ones

5spd GT

"the 5.0 owns all"

1991vert

N8Miller

I need NOS....make it 2 of the big ones

Black1987Stang

Active Member

5spd GT

"the 5.0 owns all"

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