when i took off my header, from what i rememebr...they were all the same size...17mm from what i remember....the only bolts you need to take off are the one conencted to the DP...the one you pictured lookslike the one that goes tot he cat..not the DP...

i think RRM provides you witht the bolts to connect them...cus the stock ones are bolted to the Cat/exhaust mani..

 

nah, that goes to the downpipe, I know, because the bottom of the exhaust manifold is shaped the same as the bottom of the header... who knows, maybe im wrong? Edit, that is looking up from directly under the exhaust manifold...

 

well you pic is a little blurry

 

Thanks for all your help guys, I got the header installed great with no leaks using a few bolts I found in my garage. Once RRM sends the right bolts that connect the header to the DP, I am going to replace the gaskets, and obviously use the right bolts =).

PS. Whoever said you can use the stock bolts, definetely did NOT install
their own header. The stock bolts on the bottom of the exhaust manifold
(that connects header to DP) is just a threaded stud with no head. So I
ended up with a header with no bolts to use for connecting the bottom.
Luckily I had some miscellanious hardware sitting around in my garage

 

Good to hear it got solved. Moving to Lancer Engine.