3" to 2 1/4" downpipe
08 November 2017, 12:03 PM
Scooby Regular
Thread Starter
Join Date: Nov 2012
Location: Worcestershire
Posts: 492
Likes: 0
Received 0 Likes
on
0 Posts
3" to 2 1/4" downpipe
Anybody come across a 3" downpipe that tapers down to 2 1/4"s where it joins the mid section?
08 November 2017, 12:13 PM
Scooby Regular
Join Date: Oct 2010
Location: Herts & Bucks
Posts: 8,700
That's normal for downpipes on a 2.5" system. They normally start at 3" and taper down on aftermarket systems.
08 November 2017, 12:16 PM
Scooby Regular
Join Date: May 2003
Location: Belfast
Posts: 3,285
are you measuring the inside or outside diameter to get 2 1/4"?
08 November 2017, 12:20 PM
Scooby Regular
Join Date: Oct 2010
Location: Herts & Bucks
Posts: 8,700
As for restrictions from 2 1/2 and 2 1/4 I doubt you'll notice a difference at all.
08 November 2017, 01:12 PM
Scooby Regular
Thread Starter
Join Date: Nov 2012
Location: Worcestershire
Posts: 492
Likes: 0
Received 0 Likes
on
0 Posts
Quote:
Originally Posted by
Gambit
are you measuring the inside or outside diameter to get 2 1/4"?
Inside diameter....I can get pics this evening when I finish work.
08 November 2017, 01:14 PM
Scooby Regular
Thread Starter
Join Date: Nov 2012
Location: Worcestershire
Posts: 492
Likes: 0
Received 0 Likes
on
0 Posts
Quote:
Originally Posted by
BrownPantsRacing
As for restrictions from 2 1/2 and 2 1/4 I doubt you'll notice a difference at all.
I have a hks exhaust system and that measures 3" internal diameter.
08 November 2017, 01:37 PM
Scooby Regular
Join Date: May 2003
Location: Belfast
Posts: 3,285
exhausts are measured on external diameter unless actually specified as internal diameter
11 November 2017, 01:14 PM
Scooby Regular
Thread Starter
Join Date: Nov 2012
Location: Worcestershire
Posts: 492
Likes: 0
Received 0 Likes
on
0 Posts
Quote:
Originally Posted by
Gambit
exhausts are measured on external diameter unless actually specified as internal diameter
I've just had a chance to check and it tapers externally aswell.
11 November 2017, 01:16 PM
Scooby Regular
Thread Starter
Join Date: Nov 2012
Location: Worcestershire
Posts: 492
Likes: 0
Received 0 Likes
on
0 Posts
Would this be classed as a 3" tapering to 2.5" due to the external measurement?
13 November 2017, 10:45 AM
Scooby Regular
Join Date: Oct 2010
Location: Herts & Bucks
Posts: 8,700
08 November 2017, 12:03 PM
3" to 2 1/4" downpipe
