Back to shop ↗
THE HOLDEN COMMODORE FORUM

HOLDCOM Community

Built around the cars. Kept alive by the people.

+ Start a discussion
Holden Commodores gathered at Holdcom
Forum Home›Technical help
Technical help

42r exhaust setup

Started by elare69 · 12 Jan 2014 · 10 replies

Preserved from CalaisTurbo. Original authors and dates are shown; archived members are not current Holdcom accounts. View original archive ↗

elare69Archived member
Hello anyone running 42r single or twincam - what kind of exhaust system are you running ? Gate size dump size exhaust cat muffles screamer pipe cheers Gerry
0 likes
madrexArchived member
4202 with a 1.05 rear housing on a 6 boost manifold , single cam, 44mm wastegate. With screamer pipe , 3" exhaust and dump pipe no cat and 3" staight thru muffler
0 likes
grunter01Archived member
RB26 head Gt42r Can't remember rear housing 2" screamer 44mm tial gate 4" dump 3.5" through to rear One cat from memory. 796rwhp 36psi
0 likes
tubular2Archived member
Quote: Originally Posted by grunter01 [View Post] RB26 head Gt42r Can't remember rear housing 2" screamer 44mm tial gate 4" dump 3.5" through to rear One cat from memory. 796rwhp 36psi thats some wicked hp allright.: and how do you get traction with those massive figures? do you have mini tub and what size tyres do you run? Some original photos have not been recovered yet.
0 likes
grunter01Archived member
No traction and no mini tubs, and that's with a glide and 9" with gay timing.
0 likes
elare69Archived member
would it be better like just run off the dump when racing using race fuel
0 likes
grunter01Archived member
Up to you really, I'm running full exhaust same as on street cause I couldn't be bothered swapping and changing everytime I race. ---------- Post added 14-01-14 at 17:30 ---------- What have you got so far Gerry with exhaust wise. Send me a text And I can send pics of mine if needed. [phone removed]
0 likes
boosted_wagonArchived member
4202, 1.01 rear, deanello performance manifold, 4" dump, 3.5" exhaust, no cat, 1x3.5" hooker aero chamber muffler, 66mm gate, 2.5" screamer
0 likes
86SLVLTArchived member
.96 7675 precision on a profab manifold, 44mm precision gate, 4 inch dump, 3.5 inch exhaust, single x force muffler exiting out the side under rear door
0 likes
elare69Archived member
44mm gate should do the job
0 likes
88 ChaserArchived member
50mm turbosmart gate 26 head 4 inch dump and exhaust, one AVO muffler. Stupid loud though, whole exhaust is 1200mm long and straight!
0 likes
Sign in or create an account to reply. New members are welcome—no purchase or old CT account needed.

Who’s online

0 members and 7 guests active in the last 15 minutes

No signed-in members active right now. Guests are welcome to browse.

Visitors Today54

3,683 threads, 23,233 posts and 439 images saved from CT