kelowg Posted March 1, 2018 Report Share Posted March 1, 2018 Which manifold/down pipe would best clear torsion bar. Or do both mani's come out at same angle? Next issue is e brake,but i can rig something. Trying to line things up,hate idea of truck down for month or two Quote Link to comment
flatcat19 Posted March 1, 2018 Report Share Posted March 1, 2018 Look up any of the recent exhaust/ header threads that have been made. Mike clearly explained in a couple of them how/why he fitted a D21 down pipe to an L16/L18 manifold. 1 Quote Link to comment
greenthumb Posted March 3, 2018 Report Share Posted March 3, 2018 I used 240sx mani. I think there are differences between s13 and s14. I chose the s13 as I think its longer. The e brake bellcrank is definitely a problem. I cut mine out and converted to a 510 cable for the ebrake. I really wanted to keep the umbrella handle ebrake. Because I like doing things the hard way, I also wanted to keep the twin downpipes. This also posed a problem with the torsion bar. I ended up modifying the downpipe(s) with a bunch of pie cuts to get it to curl around the torsion bar and also to end up with optimal ground clearance. Most of the ones I've seen use a single downpipe off the stock manifold, which would def be easier 1 Quote Link to comment
datzenmike Posted March 3, 2018 Report Share Posted March 3, 2018 There were KAs in trucks that had torsion bars too. I imagine a truck KA down pipe would be better that a car down pipe... if used in another truck. Then there were two KAs the E and the DE with very different exhaust manifolds. 1 Quote Link to comment
datsunrides Posted March 4, 2018 Report Share Posted March 4, 2018 I have the stock 89’ 240sx manifold and did not have to modify the parking brake. I did have the muffler shop make a new 2/1 downpipe to clear both the brake linkage and torsion bar. 1 Quote Link to comment
kelowg Posted March 7, 2018 Author Report Share Posted March 7, 2018 So d21 down pipe would seem like its closer fit. They r 2/1 at the manifold. But guess ill just cut up the 240 down pipe ,make it work. Was hoping it would just drop straight in. O well,BECAUSE DATSUN strikes again. 1 Quote Link to comment
datzenmike Posted March 7, 2018 Report Share Posted March 7, 2018 The 240sx pipe had to clear the steering box but not torsion bars. The Hardbody one had to clear torsion bars but not the box. Just put in place before tacking the flange on. Then the pipe can have a slight kink but won't be noticed. The L16 exhaust manifold holes are 1.5". The KA are larger diameter. On the L16 down pipe the pipes extend past the flange and up into the manifold for a better seal. I necked my KA piped down and left them extending 3/8" so they would fit up into the L16 manifold. Haven't had one lick of problems with it and has several thousand miles on it now. From exhaust valve to the single collector pipe is well over 30". I know it's better than the 4 into 1 L20B exhaust manifold, and I added a larger diameter muffler and down elbow.... but can you actually feel anything different? Not one noticeable thing. This tells me the stock exhaust is good enough. 1 Quote Link to comment
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