OK people I've changed exhausts on other cars no problems, and while bolts on manifold to cat are not rusty by any means they just won't budge so any tips appreciated

Cut em

How space is very tight to get anything in

Can't you get a 4" from underneath. ?

Long arm torque wrench ?

There is just no movement buddy

Soak em overnight on wd40 ?

Ol give that a whirl buddy, thsnkd

Easy peasy......

 

All 5 nuts on my downpipe were corroded, rounded off and generally a pain to remove.

Bit of WD40 on them then get a ring or open ended spanner on the back and a Bolt grip on the front. Will come off easy as pie.

 

 

 

Irwin Bolt Grips £24.99 screwfix.

 

 

 

http://www.screwfix.com/p/irwin-bolt-grip-nut-remover-set-5-pieces/96028?kpid=96028&cm_mmc=Google-_-Product%20Listing%20Ads-_-Sales%20Tracking-_-sales%20tracking%20url&kpid=96028&cm_mmc=Google-_-Shopping%20-%20Auto%20and%20Cleaning-_-Shopping%20-%20Auto%20and%20Cleaning&gclid=CMvvkO3Rs8ACFY_MtAodwEAAtA

Heat works a treat, either warm up with a blow torch or similar.

Wd40 did squat lol, managed to cut lower bolt enough to put spanner on and break it but then fubar'd hacksaw blade lol, so wondered if I get a new hacksaw and remove blade slip over downpipe and put blade back in will I be able to cut other bolt

try the bolt grips first. Honestly they are the best thing I have used for this job.