TheJZA

Has anyone here installed the Raptor headers that can give me some info? Has it affected fuel efficiency? Obviously its all about how you drive but I'm just wondering if the reduced back pressure and advanced timing (with a tune) also makes a noticeable difference to fuel efficiency? I have an XRT base tune that I got when the car was stock (just K&N air filter) and Edward had to pull a lot of timing to prevent the engine from knocking. It seems counterproductive but it actually made the car run much better because its not always knocking and drastically pulling timing. He also improved throttle and transmission response so the car drives much better than it did with the stock tune. The downside to this though is that the fuel efficiency is marginally worse than it was in stock form and I believe this is just down to the fact that the timing is retarded slightly which results in slightly less effective use of combustion pressure (peak pressure occurs slightly after top dead centre). I watched Turbo Yoda's video on YouTube where he talked about the EZ30 and he said that the stock headers cause the car to knock badly and that by installing aftermarket headers it fixes the knocking so I inferred from that that we could advance the timing beyond stock timing once headers are installed which would improve power and fuel efficiency. Any thoughts anyone? Link to Turbo Yoda's video:

Alright, cheers bro. Maybe I will just look into putting some additional sounds deadening above the mufflers to cut out some of the cabin noise. It could also be a joint that isn't sealed properly. I did all the nuts up bloody tight but the front connection seemed a bit weird. I'll get my mechanic to look at it next time I take it in for a WOF.

I love the sound but I want to fix the drone at low RPM.... So I would have to replace the mufflers? No easier option? Its not so bad that I would go to that extent, I just don't wanna annoy the neighbours when I leave early in the morning or come home late at night. Also I don't want to attract too much attention when I'm driving slowly through carparks etc.

Hi everyone. I installed the X-force Stainless cat back exhaust on my Legacy 3.0R 2004 Wagon last night and I love it! It sounds so f***ing good! Only thing is it drones a bit at slow speeds/ low RPM. Has anyone successfully fixed this without too much expense? On a side note: The stock exhaust had a ball and socket joint with spring washers behind the 3rd cat but the X-Force exhaust had a flat flange (no socket) and the bolts provided didn't fit. I ended up having to fudge it into place using the stock spring bolts and squishing it onto the "ball" gasket. I did it up pretty damn tight so I feel like it must be air tight but I was wondering if anyone else had this problem and how they fixed it? I have some photos but dont have a URL to post them to. Cheers

I’m looking at getting the Zeroflex Sub for my Legacy. Is everyone pretty happy with it? If anyone is looking for replacement speakers for the front I would highly recommend the 6” Kevlar cone woofers from surplustronics.co.nz (link below). BUT BE WARNED!! It’s an absolute mission to get them installed because the magnet is huge so you’ll need spacers, remove some of the plastic ribs on the inside of the door card, some self tapping screws, an impact driver or drill with hex bits and a bit of massaging/good placement so it doesn’t hit the window when you wind it down. They are awesome speakers though so if you’re willing to put in the effort then it’s worth it! I also bought an 8” Kevlar cone woofer to replace the sub but I didn’t realise the sub was only 4ohms so the new 8” 8ohm woofer is only about half as loud as the stock one :’) hence why I’m looking at the Zeroflex. https://www.surplustronics.co.nz/products/576-wide-range-kevlar-cone-woofer-65-inch-