RB30 into VK Calais Conversion

[njh1964]

Hi,

This is my first post... I'm working on installing an RB30 engine and 5-speed manual gearbox into a VK Calais (my son's first car project). Can anyone please advise how we should go about modifying/installing the exhaust system?

In particular, where is the best place to locate the catalytic converter, assuming we're going to use a set of extractors in place of the stock cast iron RB30 headers. We're also thinking about a 2.5" inch exhaust system from the cat back.

I know the VL Commodore floor pan on the passenger side was modified to fit the stock cat, so I'm interested in how others may have fitted the cat into the VK... without taking a big hammer to the floor pan.

Example photos would be great, if available.

Thanks in anticipation.

Regards,


Nick

[wez84]

I think with the ADR of the vk you dont have to fit a cat

[Pub247]

you might be able to get it to hang abit lower but im fairly sure it bolts up from what i remember the floorpan was modified for transmission clearance

[VK SL 3800]

On my VK with a V6 the cat tucks up and the rear end flange is inline with the handbrake boot under neath, there is a little section there where it fits nicely on mine. have a quick look under yours and you should see the spot.

[dasambo]

Hi i have had a rb30 with 5 speed box in my vk for the past 11 years the best thing i ever did i used the vl extractors and cut the flange off the end and had a pipe welded and an aftermarket cat welded to pipe then 2.5 inch exhaust out to the rear .
Not having the flange on the cat ment that i didnt have to bash the floor in also if memory is correct i did have to lower the rear gearbox mount when i modified it to make clearence for the extractors from the floor i assume you have fitted the engine allready
Sam........... RB30/20

[dasambo]

P.S. i also fitted the vl commodore dash and wiring into the vk as well

[ToMMMaY]

Cat would be least of the troubles

These things are tiny
3" High Flow VENOM Metal Cat XR6 VL Turbo Skyline R33 | eBay
Can get all diffrent sizes