I am using a Perrin Downpipe and its a very tight fit and I am tire of having to adjust the bolts every few weeks. The Perrin downpipe gets loose because it has no flex. Anyone know of a good Downpipe with no fitment issues on 05 and flex? Wich one I should buy?

 

If the downpipe utilizes the stock donut gasket where it meets the o2 housing, then you don't need a flex section. Why are your bolts coming loose? Are you torquing them to 37 ft-lbs? I've never had that problem w/ my HKS downpipe which has no flex.

 

Yes, it uses the stock donut, but no idea why it keeps coming loose and leaking on the donut. Its the fifth time I have to adjust them in 6 months. Maybe I need to replace the bolts.

What do you suggest?

 

Are the springs compressed pretty well when you torqued the bolts down? If I remember correctly, the coils are pretty close to each other once mine were torqued down.

 

megan racing.

 

Hmm.... the bolts have no springs.

 

Def should nto be working loose - what was stated is true..with the stock donut gasket, you don't need a flex section. But if you have to have one with a flex, the one from Ultimate Racing is an awesome piece, and fits the 05's and the MR's



http://www.z1auto.com/prodmore.asp?m...ust&prodid=479

 

That Ultimate Racing downpipe looks great. About the bolts and springs, where I can find a new set of those?

Could that be the problem? I would like to try something else before buying a new downpipe.

 

Are you using the OE bolts? If your bolts don't have springs, then you're definitely not utilizing the stock donut gasket.

Does your downpipe inlet have a tapered flange or is it a flat flange?

 

megan didn't fit my 05 evo. don't buy megan.

 

Yes it has a donut, I adjusted the donut and bolt myself the last time. But I dont installed it the first time, so I dont know if I am using the OE bolts or not.

 

Thanks for the info, It was one of the options because its cheaper than the others.

 

Megan is in the process of making one to fit the 05's.

 

Hmmm... if you're not using springs on the bolts, chances are, you're not using the OE bolts. The OE bolts are about 2.5-3" long.

 

Try RnR, they use flex sections.