megan down pipe 3 inches

[95burgundyesi]

I picked up a megan down pipe and messured it and before the flex its only 2 3/4 inchs and the goes 3 from then on, just wondering if i should of gotten a full 3 inch one. I thought they were but mine isnt, o well.

 

[JusMX141]

I'm sure plenty of R&D went into the downpipe you own. There's no reason for you to get upset over 14" of piping that is 1/4" shy of 3" that close to the o2 housing unless you're making some serious power.

 

[Black_Bullet]

Your fine for now as long as the rest of your exhaust system is mandrel 3inch. Worry about that manifold and o2 housing.

 

[97gstjosh]

Megan Racing doesnt make a full 3" downpipe most companies dont.
Theres no need to especially since you want just an EvoIII 16g.
This is taken from RRE:

Eclipse Exhaust System Upgrades

Our DPs have a 2 1/2" stainless steel first bend with a 2 1/2" stainless steel flex section. They then expand to 3" right after the flex section right under the oil pan area. Why start out at 2 1/2"? If you are running on the stock O2 sensor housing, even ported it is 2 1/2" inside diameter. When the exhaust gasses are hot, they flow better, 2 1/2" is plenty for the first 12". As the gasses cool , bigger helps. By going to 3" after the flex section, we allow this expansion and also allow for better clearance at the front where room is tight. From there they are a full 3" back to the Apex 3" flange with 14 gauge aluminized steel piping.

 

[98GSXtreme07]

I was so about to post what RRE said 97gstjosh! O well. But yeah if you research most companies have it where its 3inch's after the flex section.

Mike

 

[97gstjosh]

I was so about to post what RRE said 97gstjosh! O well. But yeah if you research most companies have it where its 3inch's after the flex section.

Mike